Originally posted by stillshot2 To start off, I realize that Pentax has no 35mm f1.4, at least not one realistically available.
Pentax DA 35mm f2.4, FA 35mm f2, FA 31mm limited, Samyang 35mm f1.4, Sigma 30mm f1.4 (old and new art version), Sigma 35mm f1.4 art (
here),.. I think Mitakon makes a 35mm lens, as well, but it has no automation at all; as well as older legacy lenses.
Originally posted by stillshot2 Basically I just want to see if the Pentax 35mm f2 will meet my needs to allow more into my frame but still give good subject isolation
Originally posted by enoeske That difference in aperture will not make as much a difference as your camera-subject / subject-background distance will.
This is a good reply. At minimum focus distance and a nice background, you will get plenty of bokeh. But if you are in bright light (and need to stop down), and are focusing on something 25m away from you, you will not get a shallow DoF. If you are focusing on something far-away you will generally not get shallow DoF unless you are using telephoto lens or tilt lens. Big part of photography is composition - finding the right subject, placing it in the right position, with good background, and in good light. If your technique is great, you can work it even with a less than perfect lens.
Anyway, the FA 35mm f2 is a fairly well regarded lens. Buying it used from USA or Japan will probably give you a pretty fair price, as well. Buying a brand new one in EU doesn't make as much sense, as it costs way more than the DA 35mm here..
If you want really shallow DoF at a low low price but still with good IQ, think about DA 50mm f1.8 and FA 50mm f1.4. Yes, not as wide angle as the 35mm, but much faster aperture at a low cost. Big difference between f2.4 and f1.8. And the extra 15mm focal length gives you even more bokeh, shallower DoF.
I have DA 35mm f2.4 and Flektogon 35mm, but I almost always use them at f5.6 or f8. I don't do shallow DoF photography, because it quickly becomes a gimmick