I found a really old Pentax stills camera with a Pentax 50mm f/2.0 prime lens in my house not too long ago. So the other day, I tried mounting it on my 550D; of course it didn’t fit but I was pleasantly surprised that as I held it on with my hand, the image quality on the LCD was actually good. I did some tests and I’m quite happy with the results. There’s quite a big difference between the amount of light this little f/2.0 prime lens lets in compared to my f/2.8 Tamron zoom.
I read some previous posts on this forum with a few of you mentioning that you’ve successfully used primes with your DSLRs and I think I’m now ready to acquire a few.
So what I’d like to know is:
– Is it possible to get an adapter that will mount my Pentax prime to my 550d? (SMC PENTAX-A 1:2 50mm)
– What old primes do you guys use and recommend? I’m looking for a something around the region of a 35mm, 85mm and a 135mm.
– Is it a big issue that older primes don’t have IS?
I use the Fotodiox adapter for my Pentax K lenses. It is designed to mount the lens at about 45 degrees to normal. This moves the iris lever on the lens out of the way of the camera’s mirror without impeding the function of the lens.
Some brands of Pentax to EOS adaptors require you to machine / remove the iris lever from the lens so it doesn’t conect with mirror and damage the camera when releasing the shutter.
A lot of us canon users are picking up old Nikon Lenses, you can get inexpensive mount adapters and if you look for Nikon E-series you can get them in great condition for about $50/lens. These are great lenses for the money. They were looked down upon when built because they have a little plastic in them but they are built better that most lenses today. I have the 28, 50 and 135, all are super sharp.