Category: Sigma accessories & lenses

Sony opens the NEX lens specification

Sony has announced officially and publicly that they are going to completely share the specifications for NEX series lenses. It will become possible for third-party lens manufacturers to create optical products for the Sony NEX hybrid mirror-less photo cameras. Here is very good news for the Sony customers. But it’s even better when we read…

Photography, so many failures!

photo credit: davidgsteadman When buying a photo camera, we often research in order to decide if this is the best camera, if its features will be goo enough, but will it be robust enough? Will it be useful or necessary to purchase a warranty contract extension? Will it fail very soon? When somebody asks me…

A fish-eye lens at rock-bottom price

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…

Focal length and photo lenses

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

All lens tests are wrong

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.

Comparison of 80-200mm zooms

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…

Web sites for lens reviews

It is often difficult 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 really impressive differences between two lenses, I would be prepared to judge from their price,…