Originally posted by stevebrot You might want to contact the blogger to see if he is willing to share his article again.
Or even simpler, use
Wayback Machine Originally posted by stevebrot The Industar-61 L/Z is well-respected, though not particularly popular. I think the relatively slow maximum aperture might be a factor. Might we also mention that it is mildly radioactive?
Thanks, Steve. Yep, the small aperture is a big sigh, because you only get to see the stars from f/5.6 to f/8, and that's a shame, because there's so much DOF at that aperture. But f/2.8 is pretty standard for a macro lens (or, at least as close to a Russian macro as you're gonna get)