geekyrocketguy

Stop trying to reinvent the tripod. It doesn't need this.

After having used Slik for 10+ years, I too can vouch for them.

Unlike the Chinese knockoff brands, their customer service is legit. I recently literally snapped a leg on my CF Lite (dropped a...

Were the f/1.4 test chart images labeled "focused center" and "focused corner" swapped? The "focused corner" (...444.jpg) image has better center sharpness than the "focused center" (...958.jpg)...

RF is dead to me until more third-party lenses are available.

Sony Alpha Rumors reports that it will be a 20 1.4 and 24 1.4. The full specs have been posted there. The 20 in particular is rather large.

If the 20 has good coma and corner sharpness, I'll buy it.

The Sigma 14-24 DG DN has nearly flawless coma performance, so there's hope.

I too owned the Sigma 14 1.8 and Sony 14 1.8 for astrophoto and got rid of both due to the coma/corner sharpness. :-(...

Very cool. But what fraction of the light incident on the lens actually makes it onto the focal plane?

(And I'm not judging. My background is professional astronomy, and many of our instruments...

THANK YOU to DPR for finally shooting lens resolution test charts at various apertures. This is really helpful. I was threatened with a ban for complaining about the abject uselessness of previous...

What is the purpose of putting a microlens across four pixels? My understanding is that a microlens is used to steer the light away from the CMOS circuitry and onto the photosensitive area of the...

Horshack - I believe it's possible to add transistors to the traditional CMOS architecture to enable hardware binning, though there would be a tiny read noise penalty for that (not as bad as...

Demand decreases? RAISE PRICES!
Demand increases? RAISE PRICES!

This is how it goes.

Excellent. The world needed 5 or 10 more 35mm lens options. There is so little choice in this segment.

Let's not forget that this is the company that advertises its "neutrino coating." Words don't have meaning for Irix.

"Is anecdotal evidence reliable? One person says 'yes.'"