Thanks Adi and Haken, that's very curious.

Beautiful image. When I first glanced at it, I thought someone had just finished their meal of take-out chicken.
Why do the fine slits on the front side allow us to see the things behind them, while those on the back side are almost invisible?

This is very valuable info, please don't be put off by the misinterpretations. That's normal. I've been through it myself here. The forum members are intelligent and eventually misunderstandings will be cleared up! Rik, the graph you present surely refers to finite objectives, right? I can imagine t...

here you can have a look on the test of my Sigma 105. A comparison of a 16x pixelshift reveals that at f2.8 the Sigma outresolves the sensor of a Sony A7R4/5 since the pixelshift shows much more details as a single frame :D http://www.photomacrography.net/forum/viewtopic.php?p=288434#p288434 Of-cou...

I have run out of extension tubes so I had to use stuff in the telecom scrapheap (pogopins). My spare extension tubes went into converting an old Canon Auto Bellows (FD mount) to EF lenses. Split in halves and connected by a cable. Sounds familiar? I can see from the links in your signature that yo...

I just cannibalized parts from an extension tube, and cut and soldered parts to minimize its thickness. I am lazy compared to you!

I made an inexpensive connector to control the aperture and focus of reversed MFT lenses. I think these are definitely excellent lenses when reversed on a FF sensor for m >2. But it is relatively easy to skip the connector and just set the aperture with the lens attached to an MFT camera and the twi...

"It is often stated that stopping the reversed lens down is not a good idea" Dick, I don't think any of us here would say that, except for very specific high-end lenses. Usually we do stop down the front (reversed) lens, though it should be better to put an aperture between the two lenses. The back ...

I think this is potentially a very interesting lens and I hope someone careful, like Robert O'Toole, will compare it to the Laowa. Claims that it is just a copy of the Laowa are just false, as mentioned above. The optical diagram and the glasses used are very different. Form the specs, it certainly ...

Do you have any special problems (and solutions) when shooting through water? What are you using?

Yes, that hairstreak rear-end is wonderful. As you said, the standard explanation is that this distracts a predator, making it think that the butterfly is facing backwards. The butterfly can easily escape a pounce at those tails. But your picture makes me wonder if perhaps something more is going on...

Yes, it's very nicely lit. You've solved the hardest part. There are many ways to make a bellows or extension tube easier to focus in small increments. The best may be to put the whole assembly on a manual focusing rail. In that case you could even dispense with the bellows and use a rigid extension...

It is nice to see empirical research on this mysterious subject, and their explanation is novel and interesting. I have my doubts though. My own kitchen window attracts moths, wasps, and rhinoceros beetles at night. The rhinoceros beetles in particular repeatedly crash head-on into the window, and m...

For short-lived subjects like fragile flowers, flash is very helpful, to avoid the continuous light source over-heating the subjects and causing them to wilt during a long stack. I had the "clever" idea of using a tiny plastic centrifuge tube as a vase to stand small flowers in, with wet cotton woo...

Please study Chris S's comment above!! It looks like you may not have read or understood it. It was important.