I'd like to reinforce what Jorgen said about focal length vs format size. If you are happy with a given objective on a tube lens of focal length 200mm on APS, you will get exactly that same image, with same corner quality, filling the FF sensor if you use change to a tube lens of 300mm. I am using ...

Really nice images!

I hope this question doesn't take the thread off topic, if it does I'll gladly start a new thread. It should be an easy one to answer by those more versed in tube lenses than I: is image circle affected by the tube lens or is it dictated by the objective? From my experience, it's affected by both. ...

That little lens continues to amaze. I've finished up shooting two big tests that I haven't published yet. 17 lenses at 2.1x and 8 lenses (5 lenses and 3 objectives) at 3x. Can you guess the top lens in each of those? It took a NA0.20 objective to beat the Minolta, it beat a Nikon Objective and was...

Hello Robert, Just another confirmation - I saw your earlier thread about the 6.7X magnification you got when setting up the ITL200 following Thorlabs' diagrams, and ran a test this afternoon using this tube lens in both orientations with a 10X Mitty. I got 9.9X using it in both directions. This may...

That's a beautiful object!

I just ordered a couple, but there were still six left ; )

https://www.ebay.com/itm/Cineo-Lighting ... 2381196389?

Nice and effective! How do you illuminate the mirror?, maybe with a ring of light from the rear of the subject (what's called a Lieberkühn reflector)? Thanks Pau. I used a pair of Novoflex Macrolight Plus lights, with Vivitar 183 flashes. See here Nice picture and thanks for the idea! I like the bl...

A quick and easy “dark field” adapter made from a solar cigarette lighter, readily available on eBay for just a few dollars (see for example here ). I removed the metal coil, and cut a plastic vial to reach the position at which the end of the cigarette would rest in the coil (the focus of the parab...

Amazing images!

Beautiful image!

Please see here: http://www.photomacrography.net/forum/v ... hp?t=12143

David

One reason that I wanted to start with the 600 mm f/4 lens is that after extension I will still only be at an effective f-stop of f/8 at 1X. The big process lenses are typically f/9 to start with which will take me to f/18 effective so I worry about diffraction. That said, I bought a 610mm apo nikk...

Nice - I really like the color palette! And a 600 image stack needing no retouching is an enviable accomplishment.

David

Thanks Olympusman and Sumguy01!

zzffnn wrote:Thank you very much, David. I found some images.

Cheers,
Fan

Thanks for letting me know Fan, and good luck locating some eggs!

David