Just wanted to add that I have found M42 tubes + Raynox can vignette on FF sensors if used all the way to the camera mount, so I use a few cm of full-width tubes before I add M42s with Raynox/diaphragm etc. Geoff, I have had the same experience, see above note to Chris. I just use the 52mm everywhe...

Have you found M42 too tight, Mike? Can't think that I have. Chris, Yes I did. I am using a Nikon D800 full frame. The Nikon BR-2 (I think that's the right #, at work now so can't check) reversing lens adapter is very sturdy and well made, and has 52mm threads..so mates with the 52mm tube nicely. T...

.... and depending whether you use a camera lens or a close-up dioptre or a "proper" tube lens, you may not want the extension the cone gives you. And the cones all have to be lined to stop reflections. So I'd suggest a FLAT adapter, which gives you the option of using a cheap set of M42 tubes. Che...

Steven, Your "Wooden Monster" is a work of art sir!! You and your brother are true craftsmen!! Just a note on the schematic for the stepper motor driver. It shows a 1uF decoupling capacitor on the power input. I believe the polarity is inverted. This certainly looks like a fun project and thanks for...

Forgive me if this post should have been made else where( an index thread for Mitutoyo M plan threads would be a wonderful asset to the forum). I am in the early stages of planning to buy a Mitutoyo M plan 10X ( I will buy new from Edmunds) I have a SK 210 enlarger lens that is already adapted to m...

Charles, Don't know exactly on the 52mm tube set as I am using it now for a session. I just added a couple mm but it should be very close to the total 208mm from the reversed Raynox 150 to the sensor. I removed the objective and tweaked the extension tubes until I got focus at infinity, I needed a c...

Woops, my bad!! I posted before my morning coffee!! Yes this was in the other thread. I'll copy and paste the technique below. After many failed attempts at flocking with Protostar the inside of the 52mm & 43mm extension tubes I came up with a simple method. First use art paper (thick) to cut a fit ...

Chris, Yes. These are the "cheap" tubes you get on eBay. The technique I described above for flocking with Protostar (Thx Rik for correcting the name) really makes these tubes work well regarding internal reflections. I used the Protostar on all sections of the tubes. Initially I used one large sect...

Here's a couple images of the lens setup based upon a reversed Raynox acting as a "tube" lens for an objective microscope lens. Best, Mike Sorry I can't seem to upload the images. I resized them to 1024 by 1024 max and try to upload but get a message file size exceeds limits. Probably something I fo...

John, Got permission to post images of my Raynox based lenses on your thread. One has 43mm extension tubes, the other has 52mm. I recommend the 52mm solution. BTW don't use the cone extension for the objective as shown in the 43mm lens version, use the flat adapter instead. The cone can introduce vi...

Pau,

Thanks, sorry for the multiple posts. Is it OK for me to post an image of my lens assembly for John?

Mike

Sorry, don't know why this got repeated. I can't delete because it say It's not my thread??

Hi Mike This can be a real pain and you'll waste material as I found out, but I finally figured out an easy way that is relatively easy.Mike I for one find this so frustrating so please can you post your method? Thanks John Sure. After many failed attempts at flocking with Photostar the inside of t...

Early on I used a Nikon 70-200 F2.8 @ 200mm. This worked well with the objectives, but had some vignetting. I moved to the Raynox with the 43mm extension tubes and things got a little better, and finally to the 52mm tubes and things got even better. Since the Raynox and extension tubes are very reas...

leander, I found that going beyond 2X with the Nikon 105mm (extended and/or 1.4X Tele) produced slightly less IQ than using a inf. objective in front of the reversed Raynox 150. The more past 2X with the Nikon 105 + whatever, the better relative the objective/Raynox combo produced. Since the Raynox ...