What tube lens?

The surface of the inner shell looks rather neat. Have you tried to remove the tinfoil to see whether there's writing under it?

As far as damaging the lens goes, it is relatively difficult to damage round metal tube with distributed compression. Sharp ridges are to be avoided, though. The diameter of the clamp is also important. If it is off, you could indeed damage the lens. It is also possible to dimension the clamp so tha...

Oddly, it seems eminently practical to me. Well, it is independent of used objective and practical in that way. On the other hand in vertical system like mine the removed camera body is a problem ... especially if I don't want to unplug shutter, USB and power cables. Horizontal system should be eas...

Pau wrote: ↑

Sun Oct 25, 2020 1:09 am

Of course this doesn't seem very practical.

Can't argue with that.

How could this be made to work with mirrorless? If the lens was directly supported (as opposed to being supported via camera) then it should be possible to create a system that attaches to the lens bayonet. So you'd first use the laser at the top (vertical) of the lens and when that seems OK you'd s...

Oh my! The packaging doesn't sound bad at all, at least how you described it. That's one nasty crack, was it thrown out of a plane? I hope you got a hefty chunk of a partial refund. If I was the seller, it would have been a full refund. The Raynox in question comes with 2 parts, right? If the other...

Rather small cardboard box, single layer of bubble wrap around the item and a couple of large air bags to take up most of the empty space. The item was free to move among the bubbles and the corner just happened to be against the side that took a hit. Nothing on the outside of the box, a small dent ...

I suspect that the difference (if there is one - that I didn't check) comes from the different working distance.

Then again - maybe not. I have seen similar quality thread before ... but that has been in titanium and machined by an amateur. :lol: The tubes DO thread together, but getting them aligned to begin is not exactly easy. The parts that were supposed to connect to camera and lens were beyond descriptio...

That's FD, isn't it? Couple of decades of development might help against the CA. Then again - it might not. :) More important is the f/2.8. I was thinking about f/4.0, which would keep the price reasonable. Unfortunately the vignetting behaviour is unknown. Edit: Apparently there is also EF Fluorite...

So far I have used them with objectives. With the coming two additions I may finally have the longer end covered sufficiently. That leaves magnifications 3.5 ... 7.5 as problematic area. MP-E works for 3.5 ... 5 and it is definitely enough for me under 3x, but a bit more resolution near 5x wouldn't ...

I suppose there are two main philosophies to set up your tube lenses. The first minimizes the number of required parts and the second the adjustments when changing lenses. I prefer the latter. The tube lenses are nothing special, but they work for me. The first part of the setup uses Thorlabs 3" SM2...

I suspect that ZS is not doing anything to the colors. It just doesn't know how to modify the colors to match the monitor profile. Or the colors could be wrong and ZS shows them correctly, but a program that doesn't handle profiles well shows them wrong in such a way that the colors look good. In an...

I haven't had problems damaging samples at the setup. Once I put them on the "stage", I can just slide them under my light setup. It is designed so that there is enough space under it. Operating one in micropins is dangerous for the sample, but the setup direction has no bearing on that. I have to a...