I have a Samyang 85mm 1.4 lens that I have used on a Canon 550D (Rebel T2i) and I have loved it. But now I want to use it on an analog camera, the Canon EOS 650.
The problem I am having is with the metering. The Samyang has a manual aperture ring and it has no electronic communication with the camera. On the 550D the metering wasn't a problem because of the exposure meter in the viewfinder. But the 650 doesn't have a meter, instead it only shows the recommended exposure (for example in shutter priority mode it shows the recommended aperture). This works well with Canon lenses because they are wide open up until you actually take the picture and they can communicate with the body, so it knows it is metering with the lens at the aperture wide open.
With the Samyang however, when you change the aperture the body doesn't know that; it thinks the scene just got brighter or darker. So if you are at f/2 the metering recommends f/8 and vice versa. Now of course at some point in between, the set aperture on the lens and the recommended aperture on the meter match, but I think that's not the correct value because I tried different lenses on both bodies and every combination yields the same exposure, except this one, the Samyang on the 650.
My question is, does anyone have some experience with shooting with the analog EOS cameras with manual lenses? What I thought to do is to compare the recommended exposure on the 550D and the matched lens/recommended exposure on the 650 and just set the appropriate exposure compensation for use on the 650. I am not sure, though, if it is a constant value or not. Any thoughts or recommendations are appreciated! Thanks for any info. ;)