Showing posts with label Technical. Show all posts
Showing posts with label Technical. Show all posts

Monday, 12 February 2007

Important news for Canon 24-105mm f/4L lens owners.


It seems this one slipped through most other photography website's nets.

Canon have issued a recall on certain 24-105mm f/4L lenses. Apparently early versions of the lens will exhibit excessive amounts of flare in strong backlit situations (like a gig for example). Further details of the recall can be found on Canon's website here.

Any of the earlier models affected can be shipped back off to Canon for a free repair.

Wednesday, 24 January 2007

Corrupted memory card? Fear not!

I discovered a great way to sort out corrupted memory cards in Windows XP, completely by accident, this weekend after photographing Jamie T at the Leadmill.

When I tried to transfer the RAW files to my computer for processing, Windows XP produced one of it's all-too-familiar Warning/Error messages stating that the files on my card were unreadable. The problem with shooting RAW is that none of the image recovery programs available recognise the files, leaving the information on the card ignored.

In a frantic panic, I frantically searched www.download.com for a solution to my woes, as if anything is available I'd find it on there, or so I hoped! So I downloaded a couple of freeware applications which professed to be able to retrieve the corrupted data, and drew many blanks. The final program I tried required a reboot before I could use it. I obliged and restarted the computer with my corrupted card still in the USB card reader.

Now the next bit was where the magic happened:

Upon restarting, the blue screen that you'd normally get if you didn't shut down your computer properly appeared saying that the integrity of the CF card needed to be checked using CHKDISK. Fantastic, it skimmed through the card, fixing any errors and restoring *nearly* all the lost data!

All the files I thought I'd lost had been restored, the only problem being that a few images had black space filling a band down one side of the frame. Sod's law dictated that these images would be the best of the night, but I was still relieved to have most restored to their former glory.

So what's the moral of this tale? Don't panic, just reboot and hope for the best! Just as any computer tech support person will tell you to do first time round, 'switch it off, then switch it back on again.'

Monday, 8 January 2007

What equipment? - Other stuff

Indeed, there is more to the stuff I use than just the camera and lenses. When I'm out and about, I need to carry my camera in something, plus there's other items such as monitor calibrators and flash equipment to complete my kit.

To help me cart my kit about, I use either a Lowepro Stealth reporter D550AWor Crumpler Company Embarrassment. The Crumpler bag is slightly smaller than the Lowepro, making it perfect for carrying my general kit around. The Lowepro comes into it's own when I have to carry my Nikon 300mm f/4and Tokina 80-200mm f/2.8, as these both fit vertically inside the bag.

The flashgun I use is a Nikon SB-800 Speedlite. This is plenty powerful enough for most applications and provides scarily accurate results when used with my D200'sMatrix-metering. I've modified the supplied Stofen-like diffuser by cutting a notch in the mount, so that the flash doesn't automatically set itself for 14mm wide coverage, as this robs me of too much flash power. You can clearly see the notch in the picture on the left.

I also regularly use a Jessops off-camera TTL cord. This simple, inexpensive piece of kit provides a fantastic amount of flexibility with my flash shooting.

For power, and improved handling of my D200, I use an MB-D200 battery grip. This adds more weight to the camera body, which helps with handholding at slow shutter speeds and also provides enough power for a couple of days shooting. I wouldn't be without it.

Finally, there's no point taking all these photos if I can't edit them properly afterwards. Colour is very important to me, so I use a Monaco Optix XR monitor calibrator to ensure my screen displays accurate colours. Of the calibration devices I've tried, this one provides the most consistent results.

Thursday, 4 January 2007

What equipment? - Zoom lenses

99% of photographers will use zoom lenses for most of their work as they provide flexibility for composition at the expense of their light gathering ability.

I tend not to use zoom lenses as I prefer flexibility with exposure. Lots of practice and experience has enabled me to learn to change lenses quickly, and to second-guess what the performer is about to do (in most cases) so that I don't miss too many shots.

I still own a full set of zooms though. I find them especially useful at larger venues, and at festivals where changing lenses can lead to my camera getting filled with crud. I also use them for any general photography I may do, including band portraits and landscapes.

I own the following zoom lenses:

Sigma 15-30mm f/3.5-4.5 EX DG
I bought this lens along with my first digital SLR to give me some form of wide-angle back.
The small maximum aperture makes this lens pretty useless for concerts, except at the widest setting in bright venues. The problem is that most venues that warrant such a wide angle are extremely dark and dingy.
I also hate the variable maximum aperture, although I get by with it. The main problem arises when using it with studio lights as zooming in reduces the amount of light gathered, which means I can't really use the maximum aperture if I wish to recompose by zooming. It is also very prone to flare due to the large globe of glass on the front.
Despite its flaws, optically this lens is great producing images which are easily sharp enough for large prints, even wide open.

Sigma 24-60mm f/2.8 EX DG
I haven't owned this lens long enough to get a proper feel for it yet. On the few occasions I have used it, I've been very impressed by it's performance.
My primary reason for buying this lens was for festivals, and general snaps as the range covers moderate wide-angle through to medium telephoto on my D200. It's a very compact design for a full-frame lens that is f/2.8 all the way through, which is ideal.
This particular lens can be quite difficult to find new or used. If I was looking for a lens of this range and couldn't find one of these, I would proabably go for the Sigma 24-70mm f/2.8 EX DG, which is nowhere near as compact, but is supposed to be good for the money.

Tokina 80-200mm f/2.8 AT-X
I bought this lens after shooting Monsters of Rock at Milton Keynes Bowl. That event really opened my eyes as to how difficult shooting with prime lenses can be, plus my camera was filled with more dirt than could ever be deemed healthy by the end of the day.
The build quality of this lens is absolutely fantastic! It's constructed of metal throughout and the zoom ring glides easily from one end to the other. AF is plenty fast enough for my needs as well. Although this lens is not an internal focusing design, the front element is encased inside a tough metal collar, which does not extend with focusing.
Optically this lens cannot compare to my primes, but it is plenty sharp enough at f/2.8 nonetheless, only softening slightly at the 200mm end.
Unfortunately, I think this lens has been discontinued in favour of Tokina's new 50-135mm lens, which is designed for digital only. On the positive side, this surely means that a few used bargains will crop up from time-to-time on ebay. If you're looking for a lens of this range and can't afford the Nikkor 70-200mm VR, I'd keep your eyes peeled for one of these!

Saturday, 30 December 2006

What equipment? - Prime lenses

The bulk of my work is taken using prime lenses with bright maximum apertures. The kind of venues that suit these lenses include small dark venues, through to medium-sized ones.

These lenses afford me great exposure flexibility at the expense of convenience, it took me a long while to get used to changing lenses quickly enough so that I didn't miss important shots. Keeping an eye on the performers and trying to guess what they do - before they do it is also part of the fun. That way I can make sure I have the correct lens on the camera at the right time. I still get it wrong though... more times than I'd like.

The following lenses are what I own, and use on a regular basis:

This is the widest lens I've seen anywhere with such a bright aperture, which makes this lens perfect for smaller, darker venues. The focusing ring has a built-in clutch mechanism, which prevents it from rotating when focusing. This makes the lens handle brilliantly in auto and manual focus. It would've been nice if engaging the focus ring would switch between AF and MF, but then you can't have everything. This lens is a rear-focusing design, which provides super quick AF... even for a wide-angle lens.
Optically, this lens is pretty dreadful wide open, everything looks as though it's been taken with a tacky 80's soft focus filter. Stop it down to f/2 and sharpness improves dramatically, and it's still twice as bright as an f/2.8 zoom.

Sigma 24mm f/1.8 EX DG
The design of this lens is exactly the same as my Sigma 20mm f/1.8. I leave the hood on this one so I can tell them apart easily by touch. This lens uses a standard helical-focusing design, which is quite slow when compared to the 20mm as there is a lot of glass to move around in there.
Optically, this lens is superb, only softening a little at f/1.8 and as sharp as my 50mm at f/2.8.
This and my Nikon 85mm f/1.8 are the lenses I tend to use the most of all. I've shot entire gigs with this lens alone, as the focal length on a DX sensor is very versatile.

Nikon AF 50mm f/1.4D
It's the fastest lens I own and it has produced the goods under some pretty horrific lighting. If you can justify the cost of this lens - get it!
If not the f/1.8 version will serve you well, although the f/1.4 is better at brighter apertures (I've owned both).
It's a compact, lightweight lens. So even if you primarily use zooms, it's worth stowing one of these somewhere in your kit bag just in case the lighting goes pear-shaped.

Nikon AF 85mm f/1.8
This and the Sigma 24mm f/1.8 are the lenses I use most out of all my kit.
It is stunning at f/2, which is twice as bright as an f/2.8 zoom wide open. Images at f/1.8 are a little soft, but not unacceptably so.
This lens is quite prone to flare in contra-light situations, and even worse with strong light from the side. This makes the supplied hood essential.
Out of focus areas are creamy smooth at apertures of f/2 and brighter. Stopping down more makes blurred highlights take on a distinctive shape, which can be distracting.
The rear-focusing design is provides super-quick AF performance. It's probably the fastest focusing lens I own, which is ideal.

Nikon AF 135mm f/2 DC
This lens cost me more than any other in my kit bag, but it is worth every penny.
Sharpness is good enough at f/2 to print large, so long as I'm careful with my focusing. At f/2.8 it is one among the sharpest lenses I own.
The built-in hood is a bit shallow to be truly useful, and many images I take with strong light from the side are obliterated by flare. Another annoying quirk is how easily the Defocus Control slider moves around in my bag. I keep meaning to duct-tape it fast, but haven't gotten round to it yet. I never use the Defocus feature as out of focus areas are plenty smooth enough without adjustment. I do notice a dramatic reduction in sharpness when the control is moved only a tiny bit at f/2, so I always double check it before shooting with it.
The lens is an internal-focusing design, which means AF is quick and accurate with no extension of the lens during operation.

I also own the following lenses, but they see the light of day much less often:

Tamron SP 90mm f/2.8 Macro
I've been considering slinging this lens on ebay for a while now as I barely use it, except to photograph things for ebay.
Something must be making me keep hold of it though, probably the fear of having no dedicated macro optic after yearning for one for so long before I bought it.
Optically, this lens' reputation is well deserved, although focusing is slow and clunky (which is to be expected with macro lenses... apparently).


Nikon AF 300mm f/4 ED
I picked up this lens for a silly bargain price because of a reasonably deep mark on the front element, which doesn't appear to effect image quality at all.
It is the older AF version, rather than the more refined, faster focusing AF-S version.
I use this lens for large stages at festivals and stadium gigs, and wouldn't be without it.
It's incredibly sharp at f/4, and just gets better as it's stopped down.
Focusing is a little on the slow side, but when paired with my D200 it's certainly quick enough for me.
My only major niggle with this lens is that the aperture blades are exposed from the rear of the lens. This means it's likely that crud of some description could lodge itself in the blades, which could spell the end of the lens. Here's hoping that doesn't happen any time soon!

What equipment? - Introduction to lenses.


If you are new to photography, learning a little about how different lenses effect exposure will serve you well - especially if you're about to fork out a large chunk of your hard earned cash on some swanky camera gear.

There are several different aspects of lens specification to consider and each will have a bearing on the conditions you can obtain good results in and the condition of your bank balance after purchase!

To start, I'll explain what to consider when looking for lenses for music photography (or any other demanding low-light situation)

Maximum aperture
The maximum aperture of a lens is denoted as a ratio to the focal length of the lens (e.g. 1:2.8 or f/2.8 - where 1 or f is the focal length, and 2.8 is the diameter of the aperture). Basically, the lower the second number, the brighter the lens. Brighter lenses allow shooting at higher shutter speeds in low light, and is one of the most important things to consider when choosing a lens for concert photography.

Unfortunately, the scale of brightness is not linear (so f/4 is not half as bright as f/2). Below I've provided a scale of f/numbers with each value to the left being twice as bright as the value immediately to the right.

f/1.4 - f/2 - f/2.8 - f/4 - f/5.6 - f/8 - f/11 - f/16 - f/22 - f/32

An article, which will help you to understand the science of apertures can be found here.

For concert photography, I would recommend lenses with an aperture of f/2.8 or brighter.

Zoom or prime?
Zoom lenses form the bread and butter of most photographer's camera gear. They allow the focal length of the lens to be varied continuously within a certain range. This is extremely useful for when space is tight, and for snap judgements on the composition of your images.

The Achilles heel of zoom lenses, is their relatively low light gathering ability when compared to many prime lenses. For any concert shooting I would strongly recommend lenses with an aperture of at least f/2.8, which is generally the brightest (and most expensive) available as a zoom.

For this reason alone I tend to shoot most of my work with fixed prime lenses as their light gathering ability affords me more flexibility with exposure, plus the ability to get acceptable images in even the darkest venues.

Typically, prime lenses between 35mm and 85mm have a maximum aperture of at least f/2, which is twice as bright as f/2.8, and in most cases they will produce sharper images than zooms at these bright apertures.

The downside with primes is that a full set can be expensive to build up from scratch, even if you buy all your lenses secondhand, also using nothing but fixed lenses will lead to hundreds more lens changes than with zooms. This will take its toll on the lens mount on your camera (mine had started to become brassy within one month of buying my D200).

Shooting with primes also takes much practice. If you can't pre-empt what to shoot next, and change lenses quick enough, you will miss shots left, right, and centre. The practice is worth it, and although I have a full set of zoom lenses, I still use the fixed lenses for the bulk of my work. My zooms only tend to see the light of day at larger stadium venues and music festivals, where flexibility is paramount.

Other gimmicks gizmos
Many lenses are now available that promise to rid your photos of camera shake, which can occur at longer shutter speeds. This is often referred to as VR (Vibration Reduction) or IS (Image Stabilizer). Unfortunately this will not help one bit, unless your lens is bright enough in the first place, as your subject will be blurred if they move anywhere (as musicians often do). Most of these lenses sport dim maximum apertures of f/5.6 or slower and are no use for all but the brightest gig lighting. On the other hand, certain exotic lenses (such as the Nikon AF-S 70-200mm f/2.8 IF-ED VR or Canon EF 70-200mm f/2.8L IS USM) include this feature and a bright aperture. This can be really useful... if you can afford it!

Anyway to summarise: brighter is better, zooms are more convenient and generally cheaper and primes will produce sharper images in lower light, but you will have to persevere to get the best out of them.

I personally own a lot more lenses than I could get by with and most people will be able to take great music pictures with the zoom lenses alone. Whatever suits me best may not be the best solution for you. At the end of the day, everyone is different!

Friday, 29 December 2006

What equipment? - Camera

Some would argue that the camera body is the most important part of any camera kit, after all it's the bit that makes the image, isn't it?

Modern digital SLR cameras are all so good nowadays, that they will all produce great images in the right hands, (Yes! that even includes Samsung SLRs) it's just a case of finding which one has the features you need (not want, unless you can afford them) at the right price. The most important aspect of choosing a camera is making sure you have the correct lenses for the job. The lenses form your image and provide the clarity, the camera is just a box designed to collect what the lens produces.

On that note, I'd better describe what I use and why it suits me so well.

The camera I use is a Nikon D200, and I think it's fantastic for the following reasons:


  • Metering
    This is the most important feature to consider for me, as I often shoot in quite ridiculous lighting conditions. The Nikon D200 has three main metering options:
    Colour Matrix
    , which is unnervingly accurate with flash, and great for general 'happy snaps'.
    Spot-metering
    is next on the list. I use this extensively, as it provides the most consistent results under difficult lighting conditions. It is invaluable for concerts, especially as the spot-metering area can be set to follow whichever AF point you are using. This means if I want to meter off the singers face, I just need to focus on them and adjust the exposure accordingly. Not many other camera manufacturers include this level of metering across ALL their models.
    Centre-weighted is the remaining option. I barely ever use this, in fact I can't remember the last time I did use it.

  • Robustness
    The Nikon D200 is hewn from a solid block of magnesium alloy with rubber gaskets sealing most weak points against the elements. My camera has been dropped, soaked with beer, used in torrential rain and even survived the most intense circle pits at the Damnation Festival in Manchester. If I were ever mugged on the way back from a concert late at night, I'd pity the poor desperate soul who'd get this camera slammed into their chops. That would hurt... believe me. The camera would be fine though.

  • Speed
    The D200 shoots at up to five frames per second. Not only is this useful for capturing the decisive moment, I also use it to improve my chances of getting a sharp shot with long lenses in dim lighting conditions. If I fire a burst of three to four shots, the first will always be blurred (due to the movement of pressing the shutter release), after that I have a good chance of the second, third or fourth shots being sharp. Simple really.

  • Controls
    The main difference between the D200 and models below, such as the Nikon D80 is with the way the controls are arranged. On a camera like a D80, advanced controls such as Dynamic Group AF, which I like to switch to and from regularly, are hidden away in the menu system. The D200 has a dedicated switch on the rear for quick access to this function.

  • Image Quality
    The thing I like best about images produced by the D200 is the way it handles colour at high sensitivities (ISOs). Although other cameras are more than capable of turning out images that are sharper and with less noise, the colours often look flat by comparison to me. That's unless you're willing to spend enough time tweaking those images to get every last bit of tone and colour out of them (and I don't mean just hiking the saturation). I simply don't have time to be doing that.
Anyway, I think that sums up why my camera suits me rather well, doesn't it?

Other photographers will demand other things from their camera. If you are not me, you will probably do quite well to read some reviews, handle the cameras in a shop or even hire one for a day. I believe there is no such thing as a 'best' camera, only cameras that suit some individuals better than others.

If I were starting from scratch again, and had a limited budget, I would probably look towards the following cameras:
  • Nikon D80
    Simply because it's the closest to what I have now in terms of operation, speed, robustness and image quality.

  • Canon EOS 400D
    This camera lacks the metering options I love on my Nikon D200, but is more than capable of turning out great images in low light. It is cheaper than the Nikon D80 as well, which would leave more cash for good glass, which will improve the quality of your images more than pixels ever will.

  • Pentax K100D
    The cheapest of the bunch by a country mile, but it's no slouch when it comes to performance. The body integral Shake Reduction system will also help in really dark venues. Six million pixels is plenty for most editorial images and for printing decent A3 images at home.

  • Nikon D40
    This could be a great camera for concerts if it wasn't limited to AF-S lenses. This means that you cannot use most Nikon or third-party prime or zoom lenses and retain autofocus. To make this camera useful for concerts, you would probably have to buy a Nikon AF-S 17-55mm f/2.8 or a Nikon AF-S 28-70mm f/2.8 which are both twice as expensive as the camera!

What equipment do you use to take your photos?

For some strange reason I get quite a few emails asking me what equipment I use to take my images , or that I would recommend for someone else to use.

Apart from finding this a little bizarre, (it's not like I'm a household name or anything) I also rarely have the time to compose a detailed reply to people's questions... so I decided to create this part of my blog where I can refer inquisitive types to.

I've split everything into a few different sections linked from this page, and hopefully everything relevant has been documented. Now when someone asks, I can say, "Looky here" and (hopefully) all questions will be answered.

I've also includfed what I think of each bit of equipment I use so that it's kind of like a mini-review. It'll be a far cry for some of the massively scientific pixel-peeping doodars that people on certain photo websites create, but it will be my opinion based on my experience using the equipment in the field.

A large emphasis will be placed on usability, rather than 'image-quality', this is because I feel strongly that it's pointless having the sharpest/fastest/megapixelly gear, if you can't coax it into doing what you want easily. If you can't get what you want, you may as well not bother.

Please feel free to browse the different sections below...