Mr. Ambiguous

Since you posted that I guess you haven't tried google it yourself? The only information a google search reveals is the front diameter of the filter thread, which is not of importance... it's the diameter of the front element I'm interested in (I'm sure the information could be find on some website, but where? That's the question...)

Hi, I'm looking for the diameter of the front element on the following Sigma ART lenses: 35mm 50mm 85mm Couldn't find anything online. If anyone here happens to have these lenses, it'd be more than appreciated if you could measure it! /cheers

Hi everyone! I apologize if this have been covered here before, I searched and googled for it but came up empty handed (feel free to send me a link if you know any) So, I have an upcoming project which are about to shoot this summer. At our disposal we have a Sony A7s II together with the Sigma MC-11 Canon to Sony adapter and also a Speedbooster for those APS-C shots. We've been looking at the Anamorphot 1.33 - 50. At SLR Magic's website they state the following: "40-85mm focal length can be used for Full Frame sensor." Since the Anamorphot adapter will make the focal length wider, is there a way to calculate what for example a 50mm lens will become equivalent to (in terms of focal length) with the 1.33 -50 Anamorphot adapter? Is is as simple as multiplying the focal length of the lens by 0,77? (Figured x0,77 since the adapter squeezes the image by 33%: 100% - 33% = 77%) A 50mm turns into 38,5mm? A 85mm turns into 65,45mm? Also, why 'can't' you use a lens above 85mm? //cheers