Andrew -

I think that would be an excellent idea, although it would inevitably suffer some of the problems that plague buy/sell/wanted sites on other forums.

David

I've had this 63mm f3.5 El-Nikkor for a while. Just decided to do a little serious rehab on it (clean, straighten the dented filter ring, etc). Were the aperture to open all the way (blades behind the guard collar) it would hit 22.0mm, f2.86. Anyone ever heard of one of these being "opened up" to t...

David, One question about the Rodagon: You wrote that yours is of a 4-element design. As far as I know the Rodagons are 6-element lenses, at least the latest versions, and to me yours doesn´t look too old. :-k So, do I get this right that yours is of a different, possibly still older design then? (...

David, great tests! A couple of comments/questions... 1. About the Minolta colors, I suspect a color management glitch someplace in the pipeline. If I convert the Minolta image to an Adobe RGB profile, then assign it back to sRGB, the resulting appearance and color histogram become strikingly simil...

I just tested seven lenses at 4X magnification, an action inspired by the thread previously posted by Tonikon here: http://www.photomacrography.net/forum/viewtopic.php?t=6318 The contenders : http://www.photomacrography.net/forum/userpix/159_lenstak_2.jpg The arena : http://www.photomacrography.net/...

Looks like a very nice lens with sharp edge-edge to detail; HW Colias eurytheme ? As I find "This data is ..." SEE HERE mildy annoying can you imagine how I, as an entomologist, feel about the orientation of this wing? No? OK. :lol: You have a good eye NU. It is C. eurytheme . In the light of day, ...

D200, Nikon Plan Apo 4X

Pipevine swallowtail (Battus philenor) D200, Nikon M Plan ELWD 20/0.5

Toni - These images may be of interest to you: ....... I finally got a Nikon CFN Plan Apo 4X objective, and ran some tests today. The original object field was 3.68mm wide...... David Many thanks, Dmillard. First of all, please forgive my delay in answering...my connection problems now was resolved...

<< I'm a little puzzled, too >> :) Well, on the occasions I've viewed a rule / measure thro the v/f to get some (reasonably accurate) idea of mag, I've not found it partic easy to see exactly where the markings line up with the edges of the v/f. So, taking a pic of the ref and viewing same in pshop...

Those test images of the Red Admiral are very attractive as well as informative. The difference in resolution is obvious and makes perfect sense. But I'm curious about some artifacts I see in the lower right corner of the second image. I'm speaking of what look like "echo" or "stutter" halos around...

augusthouse wrote:Excellent comparison David.

Do you have, or have you used a glass micrometer slide?

Craig

Thanks Craig. I used a glass micrometer slide - I'll revise my earlier post to clarify that.

David

<< The original object field was 3.68mm wide, determined by measuring 3.5mm on a micrometer through the viewfinder, and then dividing by .95 to reflect the viewfinder coverage >> Any partic reason why you didn't take a pic and check the frame width in pshop? << .95 >> I'm always confused (nay, puzz...

Antonio -

All very nice, but I especially like the color and composition of #3.

David

Toni - These images may be of interest to you: http://www.photomacrography.net/forum/userpix/159_apocut_copy_1.jpg Red Admiral ( Vanessa atalanta ) forewing at 6.4X, Nikon CFN Plan Apo 4/0.20, D200, 30 images at .01mm stacked in HF http://www.photomacrography.net/forum/userpix/159_Achrocut_copy_3.jp...