Mystery telephoto

[Stvjhn]

Hi,

I would be really pleased if anyone can help.

I have a mystery telephoto lens and am trying to identify the camera it would fit to as it is no good for mine (Canon 450D). EDIT: I now realise its a generic M42

SIGMA - XQ HIGH POWER ZOOM

MACRO SYSTEM

1:4.5 f=70mm - 230mm

Multi Coated.

It is a heavy solid metal construct and seems to be a high spec (internal ribbed baffling) so much have cost a lot when it was first released very many moons ago.

It is manual only.

It has a T2 thread at the eyepiece end and a little rod that presses down to activate the internal stopper (using a T2" to EOS adapter does not push down this lever so that is not an option it seems). EDIT: I NOW REALISE ITS M42 AND YOU CAN GET AN ADAPTER WITH A FLANGE TO DEPRESS THE APERTURE PIN - I was fooled by my T2 fitting half way and presumed a damaged thread was the issue.

It also has a tripod attachment ring (necessary due to significant weight)

Attached are some pictures.

Once again thank you for any help that can be given. 

 

Edited August 28, 2020 by Stvjhn
Learning Curve

[Davey-T]

Hi and welcome to SGL, it ma be an M42 camera thread very similar to T2,  used in the distant past before bayonet fitting was introduced.

Dave

[Seelive]

If you use a T2 to EOS adapter then why can't you use it with your 450D?

[rotatux]

Threads are different between T2 (×0.75mm) and M42 (×1mm);

I can screw my T2 adapter in full only on half of my M42 lenses, others only screw half or third of the "bayonet". I have the Vivitar equivalent of your lens and like you can only screw part of a T2 adapter on it (but I'm using this as lens2scope to put oculars, not for camera)

In doubt you would buy a specific M42 adapter for your camera.

[Louis D]

Most likely Universal thread M42 mount.  Sigma did not make any T-mount lenses to my knowledge during that era (mid-70s by the look of it).  They were all dedicated to a particular mount.  Get an EOS to M42 adapter.  There's plenty of film to flange distance for it to work.  I've got several M42 lenses that I've used on my EOS cameras to good effect.

[Tenor Viol]

M42 was the standard 'screw fit' for camera lens fitting until bayonet became the standard in the mid to late 70s. 

[Seelive]

If it is a M42 thread then adaptors for Canon EOS cameras are readily available. However, some of the cheaper ones are not always a particularly good fit on the Canon side, OK for the lighter lenses but not really suitable for heavier lenses like that one.

[JonF]

It is an M42 fitting, easy to get it to fit the EOS range. I use a range of M42 lenses ranging from wide angle to 1100mm, on my Canon DSLRs. Never had a problem with an adapter. You need to make sure you get the sort with a flange which will depress the aperture pin, otherwise you're stuck at max aperture.

[Stvjhn]

Hi,

Thank you to everybody who has commented thus far. I have had my DSLR 450D for a month (my first). It came with no lens as I plan to have a proper crack at Astrophotography (sadly just camera to eyepiece thus far).

Then I thought I'd get a lens so that I had one. It became clear that it was far cheaper to get an EOS film camera with a lens on eBay (with autofocus) than a lens. I struck lucky with an EOS 300 winning the bid at £6.50 that came with a Centon flash gun (which works on mycamera), a Canon AF 28 - 80m - what I was after and this big Sigma lens.

Those of you who said M42 I now know were spot on as  theT2 only got half way and was certainly not up to the job even with the tripod mounting ring to put the lens directly on a tripod.

As the last reply noted the T2 does not depress the aperture pin. 

However, I have now ordered a flanged M42 which should work ok.

Edited August 29, 2020 by Stvjhn