Sigma accessories & lenses

When you use an expensive SLR camera you are often tempted to purchase a specialty lens like a ultra-wide angle (fish eye) lens.

But, apart from the rare occasions when you really need it, it’s too expensive for you and me. Why not build it yourself? Instructables does the demonstration with a Nikon D90, but it could be done with any other camera.

How to make a fish eye lens for a Nikon D-90 Digital SLR for $16

Tamron rewrote its web site. This was the occasion to move the Lens Comparison Tool but it is still useful to compare a 400mm with a 500mm (or a 35mm with a 50mm).

Tamron - Lens Comparison Tool (based on focal length)

But you can also find a similar tool at Olympus (and it takes into account the specificities of 4/3 sensor format, of course): Perfect Lens finder.

Olympus Perfect Lens Finder

Juza has tested the biggest Sigma tele-zoom lens: Sigma 200-500mm F2.8 EX DG. If it seems to be quite good, it is both horrendously expensive and nearly impossible to lift:

Sony lens - 'Hiding' by Scoobay

I recommend reading a nice little post titled “All lens tests are wrong” that concludes that the only good test for a lens is to use it during a full year.

Not wrong, but I still recommend to also check my list of web sites with photo lens reviews.

Thanks to Tamron, it is possible to easily compare photo lenses of different focal length and their effect on the size of an image.

Tamron focal length comparison (click on the image)

Tamron focal length comparison

DPreview has a good comparison of 4 zoom lenses opening at f/2.8 for SLR cameras:

• Canon 70-200mm F2.8 L IS USM
• Nikon AF-S VR 70-200mm F2.8 G
• Sigma 70-200mm 1:2.8 EX DG Apo Macro HSM II
• Tamron 70-200mm 1:2.8 Di LD (IF) Macro

Since they are one of the most coveted segment of the SLR lens market, it was worth mentionning despite the absence of some serious participants like the Sony SAL-70200G – 70-200mm f/2.8 G-Series offering (originating back into the days of the great white lenses from Minolta) or the Pentax SMC-FA* 80-200mm f/2.8 [IF] ED.

Canon lenses, which one is best?

It is often difficult but manageable to group lens reviews in order to compare/evaluate a little more than their mere physical characteristics (focal length, aperture/diaphragm, or even number of individual lenses). But how would you evaluate/review optical quality? When I see the difference really impressive between two lenses, I would be prepared to judge from their price, but a cheap wide-angle lens is not always worse than a slightly more expensive one (well… if the price difference is really large, it’s not only an accident and quality explains a lot).

So, where to?

I collected a few web sites appearing quite able to provide this kind of quality reviews/comparisons/evaluations/tests.

From here, I invite you to an orgy of lens reviews, lens tests, lens comparisons, lens evaluations. And remember to shoot some photos, too. It’s not only the lens which does the photo. Some are shot by telephones, if the photographer is an artist.