Search found 448 matches

by jsp
Wed May 11, 2022 1:10 pm
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

I also realised that I think a slightly overcast day or quite early morning before the sun is really high is good, because then no diffuser is needed. I'm really glad that the software aligns the images, because it means maybe I won't need to worry about saving up for a camera body that does focus b...
by jsp
Wed May 11, 2022 10:17 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

Hi Chris, That's really encouraging to know that the stacker software can align the images so well. I really didn't expect that. One of the perks of photographing in the greenhouse is that the light is very bright so I can take my shots on very fast shutter speeds and entirely elimintate motion blur...
by jsp
Tue May 10, 2022 2:51 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

Here is my latest "hair-of-the-day" photo. It's the same technique exactly as above, but with a 10x objective. Same courgette plant, still in its pot. Helicon focus is weirdly forgiving of the camera movement that occurs as I turn the focussing knob.
by jsp
Mon May 09, 2022 5:52 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

Hi, Thank you very much for the feedback on positioning the specimen. I'm so glad to know that it's not just me that goes to such complicated lengths to get the subject positioned. With the speed I have to work to take the stack before the fern wilts, it becomes almost olympic levels of exercise get...
by jsp
Thu Feb 17, 2022 1:57 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

This is my chart, in case it's useful for anyone else. The equipment is: Canon 5d MkII (full frame) Canon EF 200mm f/2.8L II USM Mitutoyo M plan Apo 5x / 0.14 infinity / 0 f=200 Mitutoyo M plan Apo 10x / 0.28 infinity / 0 f=200 Mitutoyo M plan Apo 20x / 0.42 infinity / 0 f=200 Mitutoyo M plan Apo 50...
by jsp
Thu Feb 17, 2022 1:51 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

This one was taken in front of a fluorescent tube light box with no flashes and no torch for positioning. The second leaf that I tried did still wilt dramatically while I was working, just because it had been picked from the plant. The light wasn't even hot.
by jsp
Wed Feb 16, 2022 12:54 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

This is a hair photographed with the 200mm prime and the 50x Mity lens. I'm not convinced that moving up to the 50x really has any great advantages with my particular photographic subject, given how much harder it is to work with, and how much shallower the depth of field is. The hardest part of thi...
by jsp
Tue Feb 15, 2022 2:04 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

This is another hair on the same plant, but with the 200mm prime and the 20x Mity. The whole focus stacking thing just stopped working this time in many different ways. I just couldn't get it to work. Partly the leaf kept gradually changing shape under the lights. Then I couldn't seem to get the sta...
by jsp
Tue Feb 15, 2022 12:20 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

Hi Chris, It's really intresting to know all that. I didn't know it before. The hairs are definitely "stingy" on the hands. I'm not completley sure what the plant is because there are two wild plants in our garden that look very similar in winter and I can't entirely remember which one this is. It d...
by jsp
Mon Feb 14, 2022 1:42 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

Here the specs of my various setup possibilities: Canon 200mm prime + 50x Mity: Only one black line on the micrometer can be brought into focus. Working distance (WD) is 12.5mm. Canon 200mm prime + 20x Mity: stack DOF 1/100th cm. Image width 18/100ths cm. WD 15mm. Canon 200mm prime + 10x Mity: stack...
by jsp
Mon Feb 14, 2022 1:01 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

These two hairs were photographed with 100mm macro zoom and 10x Mity. I figured out that the problem with the 100mm lens before was that it had a UV filter on, and with that removed, the lens now works fine. The frame is not filled by light but the circle in the frame that is lit is 50/100ths mm acr...
by jsp
Sun Feb 13, 2022 7:53 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

I just tried photographing hairs with my 10x lens. There are very large hairs in the photo, but it is the tiny ones that are relevant to me because they are the size of the ferns that I am trying to photograph. In the big stacked image the big hairs are not actually that clear, but the tiny ones can...
by jsp
Sun Feb 13, 2022 6:24 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

I just tested my x50 and x20 on plant hairs and it was really no use as the hairs never sit vertically, so there is always quite a lot of depth in the photo, even for a tiny hair.

I think I will have to stick to x10 even for my tiny subjects.
by jsp
Sun Feb 13, 2022 6:23 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

JKT - I'm glad you like them. I'll do a test on the sensor in a bit. Thanks :-)
by jsp
Sun Feb 13, 2022 6:23 am
Forum: Equipment Discussions
Topic: Canon 200mm Prime as a Rail.
Replies: 49
Views: 2063

Re: Canon 200mm Prime as a Rail.

It's looking as though x10 is maybe the sweet spot for depth and focus, given what I am trying to do.

Maybe I will work on optimising that and figure out how to pose hairs vertically.