Originally posted by sandpiper6 I was told to never put a digital lens on a film body. You can do the opposite though. Something about the size of the mount/pins, etc. Anyway, you can bust your mirror and/or something else in your film body with your digital lens (b/c it has deeper whatever-they-ares.)
Applies to Canon EF-S lenses. All Pentax K-mount lenses ever produced can be mounted on any Pentax K mount body ever produced. No problems at all. As usual, your camera store owner/sales think Canon/Nikon only.
Originally posted by sandpiper6 What did we play around with? Getting a fish-eye effect with what the kit lens?! (I think that's the one).
I think the effect you are talking about is actually just dark corners due to smaller image circle of DA18-55 lens at 18mm. The lens is still rectilinear (off-center lines stay straight).
Originally posted by sandpiper6 Our digital cameras have a 1.5 factor that makes a 14mm lens, a 21mm lens for example. The film cameras are full frame. Digital is not (except in those identified as "full frame sensors" like the Canon 5D).
This is the most confusing thing ever with digital cameras. So called "crop factor" as just that -- a
crop factor, not a focal lens multiplier. So 14mm lens stays 14mm lens regardless of the sensor or film size. Smaller size of APS-C sensor would result in reduced
field of view only.
Now, how experienced film users could visualize that 1.5 difference (or 1.6 with Canon)? By telling them "your digital camera with 14mm lens would have field of view identical to 21mm lens on your film camera". Then we say, "Aaaah, I see, so 14mm is an ultra wide angle lens on digital, I am buying it!". Thus, it only helps
us visualize the result of a certain lens on digital based on our experience with film, while it does
absolutely nothing optically to the lens.
Originally posted by sandpiper6 I can't explain it completely like Joe could. I probably butchered the whole explanation. I'm sorry if I did.
No problem: the topic is really not a simple one and many professionals do not quite understand it, not to mention manufacturers who are trying to confuse us even more in order to make us NOT try anything except for the newest of the newest (and expensive) designed "for digital only". Pentax is the rare exception and that's why I stay with Pentax.