Can T90 use breech mount lenses : LUSENET : Canon FD : One Thread


Can breech mount lenses be used with the T90? Are there any restrictions?

David Armour

-- David Armour (, February 24, 2001


It certainly can. FD breech-mount lenses function just like New FD bayonet mount lenses.

You can even use earlier FL and R mount lenses, but without auto-diaphragm functionality (you have to meter in stopped-down mode and the lens will not stop down automatically).

-- David Goldfarb (, February 24, 2001.

There are a small number FL lenses that won't mount on a T90. These are wide angle (e.g. 19mm) lenses that project backwards into the mirror box. You need to lock the mirror up before you mount them and to put a viewfinder on the hotshoe. The t90 doesn't have mirror lock, so you can't mount them.

-- Roger Broadbent (, February 25, 2001.

To elaborate on Roger's answer, from the T90 manual: Lenses which cannot be mounted are the FL 19mm/f3.5 and FL 58mmf/1.2. Lenses which 'cannot be used with the T90's meter for mechanical reasons': FL 19mm f/3.5 retrofocus, FL 35mm f/2.5, FL 50mm f/1.8-I, FL 58mm f/1.2-II. Regarding these, 'Use of an indemendent exposure meter is recommended.'

-- Alan Swartz (, February 25, 2001.

This is interesting. I have owned and used many Canon manual cameras including the T-90 and this issue must bring on a host of other questions such as off brand lenses. Are they compatable with the T-90? I tried using my sigma 16mm 2.8 with my T-90 and had little luck. Halfway through the function of exposure the lens stopped, looked like it stopped down to f-8 or so and darkened. I had to remove the lens to start again. This was interesting because this lens is designed to work with FD. I own a breech mount 55mm 1.2 and it works great with my T-90. I don't think this issue has been given the attention it requires.

-- dave B. (, August 06, 2001.

T-90 and A-1 user here. No problem with any lens working, including 17mm Vivitar (incredible lovely lens- straight lines stay absolutely atraight...)

The two FD fittings- breechlock versus the more modern one- make no difference at all to how lenses function on the camera. On;y odd and even older lenses- as specified above- will not work.

Re. the last poster, I would LOVE to have a 16mm Sigma lens! (For when I DO want bendy!... had one once and foolishly sold it for a pittance...)


-- Jim Cross (, August 15, 2001.

I had a FL 58mm/f1.2 lens,does anybody had experences with this lens? Also does it work with the new F-1? Thanks Chang

-- h.c.chang (, October 19, 2001.

I have a FL 58mm F1.2 lens and will not work with my AE-1 Program camera. All frames are garbage and sometimes the mirror does not return. There is interference inside the camera.

-- David (, November 03, 2001.

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