Finally got some time to work on this. I disassembled both my old stacking setup and tube lens, rebuilt everything, and ran a stack.
Setup is more stable, diffuser greatly improved, and most importantly, the ITL200 is now connected in reverse. I had to purchase some extra tubes from Thorlabs to get it right.
The tube setup is now:
245mm from sensor via SM2 Tubes -> ITL200 in overpriced SM2A20 adapter -> 75mm via SM2 tubes -> Objective
The tubes have flocking material inserted. Without that, it's a nightmare with hotspots everywhere.
The results are a great improvement compared to anything I've previously been able to accomplish. I'm quite happy with what I have now.
Still lots of room to improve on lighting, and I need to fix by convoluted flimsy specimen stage, but it's getting there!
Sunset Moth:
Here's the full resolution photo:
https://farm2.staticflickr.com/1956/454 ... c1f9_o.jpg
Here are some crops, snipping tool on Capture One preview:
Centre:
Four corners:
Bottom Left -- Bottom Right -- Top Right -- Top Left
The corners aren't as good, but they are not significantly worse compared to my previous ITL200 attempts. This is also shot on fullframe. When I get my D500, it should yield consistently sharp results across the entire frame.
Thanks!
~ MC
Thorlabs ITL200 Tube Lens -- Update
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Here's an example of what I was able to get previously:
It has a lot more dimension, however the image quality is significantly worse. I need to work on getting the lighting right as well.
Centre and corner:
The stack illustrated above is Dmap as well, which in my experience tends to produce a lot more... well... depth, as the name suggests.
It's 6am here and I should have been asleep 6 hours ago. Enjoy
It has a lot more dimension, however the image quality is significantly worse. I need to work on getting the lighting right as well.
Centre and corner:
The stack illustrated above is Dmap as well, which in my experience tends to produce a lot more... well... depth, as the name suggests.
It's 6am here and I should have been asleep 6 hours ago. Enjoy
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Thanks!RobertOToole wrote:Hi MC,
Looks great! Even the corners look very good, especially the last crop, top left?
Good work!
Best,
Robert
Kudos to your "stepping outside of the box" discovery too, I never could have imagined fitting the lens backwards whilst the website shows a "correct" setup.
Notice how the corners for the reversed stack is significantly better than the centre of the "correct configuration" stack?
I did notice slight motion blur on my original stacks. Left a window open, no wonder I have a gnat infestation...