Heritage Cameras

Actually there does seem to be at least one independent battery grip for the EOS M50: http://canon-eos-m50-battery-grip.bujacze.com/

Unfortunately most Contaflex lenses are very hard to adapt to other cameras, as they're only interchangeable front groups – the rear groups stay inside the camera. There are DIY solutions, but ...

Yes, I agree – Canon EF.

Yes, there seem to be quite a few slightly different versions. Some are fixed mount, and the Toshiba/Topman/Tosner mounts I've seen are specific to one maximum aperture and don't have the maximum ...

I think your lens has interchangeable mounts for different cameras, and it looks like the Toshiba/Tosner/Topman system. You'll notice that there are two different scales on the aperture ring. The ...

You're welcome – glad it worked out.

It looks very much like this one: https://www.natcam.com/products/pentax-zeiss-645-80mm-f2-8/ If it looks the same from other angles too, I believe it's a Pentacon Six lens with a Pentax 645 ...

Assuming that the OP hasn't solved his problem in the last five years (!), and for others that might be interested, how about rubber plugs/bungs instead of the screws? Small pieces could be cut ...

Don't give up just yet... it's not easy, but it can be done: https://www.dpreview.com/forums/thread/4183889

I thought your idea of a focal reducer with removable optiocs was interesting, but unfortunately I don't think it would work. Focal reducers are shorter than non-optical adapters, so there'd have ...

Here's a Sony web page that explains the difference between the various LA-EA adapters: https://www.sony.co.th/en/electronics/support/articles/00021281 In theory any of these should work, but as ...

Yes – if you had the lens in Sigma fitting it would work with your SA to E MC-11 adapter. Also, if you had the lens in Canon fitting it would work with the EF to E version of the adapter. Unfortuna ...

Yes, as I suspected that's a Sony A-Mount lens for DSLR and SLT cameras. The adapter you have is for fitting Sigma SA/SD lenses onto Sony E-Mount cameras. This combination is never going to work, ...

Sigma doesn't make this lens in Sony E-Mount fitting for your A6300, so if it is a Sony fit it will be for the older A-Mount. You can identify this by looking at the rear of the lens, where you ...

The Tamron Adaptall 2 SP 300mm f/5.6 (model 54B) goes to 1:3.3 – is that close enough? If not, an extension tube will get you all the way. http://www.adaptall-2.com/lenses/54B.html Seems to get ...

I think that Bolex product is a wide angle converter, and 4mm is the focal length it provided on the camera it was originally designed for. In fact, a Google image search seems to find more than ...

...and Komura Intermount, Soligor I-S, Sigma/Sun YS, Toshiba/Topman/Tosner... :-D

There's also the Canon Lens Mount Converter E for East German Exakta internal bayonet lenses on R, FL and FD cameras (or adapters): CK's Lens Post: Canon Lens Mount Converter E -- Exakta to FD Some ...

As Tom says, stacking adapters certainly can work, and with the right combinations will still focus to infinity. However, M42-Nikon is not the best choice for this as such adapters must contain ...

Yes, agreed – it will focus to infinity (manually). Many Minolta AF and Sony A-Mount cameras (including the A77 II) will work in metered manual or aperture priority auto exposure modes, with manual ...