Search found 12 matches

by Alex H
Fri Sep 04, 2015 4:22 am
Forum: Photography Through the Microscope
Topic: Nematode
Replies: 14
Views: 1796

zzffnn wrote:Outstanding photos! Thank you for sharing.
Anyone knows what is that thing/structure in the second photo? A baby?
It is one of the two "branches" of the female reproductive system. What you see are developing ovocytes.
by Alex H
Sun May 24, 2015 1:26 am
Forum: Equipment Discussions
Topic: Olympus OM-D Em5 Mark II: High resolution shot mode
Replies: 18
Views: 5666

Chris S. wrote: But the software end is not so obvious to meā€”once one obtained the eight pictures, how would one combine them?
--Chris
PhotoAcute (http://www.photoacute.com/) might do the trick. I tried it once long time ago, but not recently and not with this type of images.
by Alex H
Tue Apr 14, 2015 11:17 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Lomography Petzval lens
Replies: 16
Views: 12703

Another interesting soft focus lens is Tamron Adaptall-2 70-150/2.8, which, like Minolta MD 85mm and Minolta MAF 100mm (and probably others) introduces spherical aberration by moving some of the lens elements. It is rather sharp when soft focus effect is set to "0". I have been shooting with one for...
by Alex H
Tue Apr 14, 2015 12:08 am
Forum: General Discussion Forum and Community Announcements
Topic: Spiders' coloration--especially in UV--can lure prey
Replies: 3
Views: 1817

1--What equipment did you use for your images? Custom made dual camera setup with one regular camera and one full-spectrum modified camera. 2--What wavelengths of light did you record? Visible image was recorded by ordinary camera, so somewhere between 410 and 690 nm. Reflected UV image represents ...
by Alex H
Sun Apr 12, 2015 5:26 am
Forum: General Discussion Forum and Community Announcements
Topic: Spiders' coloration--especially in UV--can lure prey
Replies: 3
Views: 1817

The BBC article seem to be oversimplifying the UV "story" but I have no grounds to comment on it. Instead, here are two examples of spiders shot in visible (top) and UV (bottom) spectrum.

Image

Image
by Alex H
Tue Mar 31, 2015 8:10 am
Forum: Equipment Discussions
Topic: Venus 2x Super Macro first impressions
Replies: 17
Views: 6167

Thanks Ray!
by Alex H
Tue Mar 31, 2015 12:53 am
Forum: Equipment Discussions
Topic: Venus 2x Super Macro first impressions
Replies: 17
Views: 6167

I was still contemplating about this lens when I found another review that showed what noone else showed - lens performance at medium focusing distance, and the distortion it produces: http://regex.info/blog/2015-02-26/2530

I assume it is not so much of a problem at higher magnification, is it?
by Alex H
Thu Mar 05, 2015 10:21 am
Forum: Equipment Discussions
Topic: Venus 2x Super Macro first impressions
Replies: 17
Views: 6167

Today I found this review: https://www.wimarys.com/venus-60mm-macro-lens-review/ . If one checks the test charts, one can see noticeable chromatic aberration in the corners of the frame even at F/11 (tested on full-frame camera). The center looks much better. So my question to you, Ray - how much ch...
by Alex H
Tue Feb 03, 2015 5:33 pm
Forum: Photography Through the Microscope
Topic: Nematodes
Replies: 11
Views: 1093

darwin wrote:I would not be surprised that they would belong to the same genus. Cephalobidae are a taxonomic mess, and these probolae are highly variable.
Thank you, it is always good to have expert opinion in such cases.
by Alex H
Tue Feb 03, 2015 7:42 am
Forum: Nature Photography -- Macro and Close-up
Topic: Venus 60mm 2:1 macro lens - field test images
Replies: 3
Views: 2209

It is a peculiar lens. So what is your conclusion about its optical properties, comparing to MP-E65?
by Alex H
Sun Jan 18, 2015 9:48 am
Forum: Photography Through the Microscope
Topic: Nematodes
Replies: 11
Views: 1093

Third and fourth are Cervidellus, second and fifth are indeed Acrobeles
by Alex H
Sun Jan 18, 2015 9:24 am
Forum: Photography Through the Microscope
Topic: Nematode
Replies: 19
Views: 1865

It is a male of one of the genera of the family Tobrilidae. To identify it properly, one needs to see details of the anterior end.