Originally posted by someguy42 I hadn't considered getting a teleconverter. Do they affect the IQ at all?
The Pentax HD DA 1.4 TC seems optically great, for me it doesn't affect quality much at all, if you consider that it's hard to get the same quality out of a 200mm lens you can get out of a 100mm lens. You're going to lose a bit of overall quality, but not in your subject area. I've only used the TC for long lenses.
I'm not even sure what their characteristics would be on short lenses. On my sorter lenses, I want them to be reasonably fast, so losing 1 stop for this TC isn't an option. With longer lenses you take what you can get, or you pay a fortune.
Anyone used the 77 ltd with the TC? Being a 1.8 lens, losing a stop wouldn't be so bad. A 1.4 TC on a 77 would still be about as fast as The DA 70 at 100mm. Taking a 2.4 lens to almost ƒ4 would just be painful, at least for me.