Originally posted by Bertminator the pictures were pretty blah! Now, I know that the lighting was pretty bad & the color lights didn't help, not to mention that the high ISO wouldn't produce nice photos (grain-wise) etc..., but it put me kind of down & sad about the camera's overall photo quality.
You don't mention which lens was used for this, if the kit lens then it is fairly slow and the ISO would need to be high to keep your shutter speed up. But you don't say what ISO, 800 should be no problem, 1600 should be fine above that you will need to shoot in RAW and add de-noising to improve. Without examples (and EXIF) it is hard to really offer an opinion, but I can say that low light concert is very difficult and not something I would suggest you learn on until you understand your camera.
I understand you have some experience, and some film things transfer over to digital, other things don't. There is a significant learning curve and expecting your film skills to automatically transfer might be leaving you thinking you can run before you walk. You need to start with the basics, learn to get good images in good situations, good light static subjects. When you can do that move on to more difficult subjects.
Originally posted by Bertminator Pentax 50mm f2.0 "m" lens with a Vivitar 2.0x tele-converter. I took those because I figured even with the converter it's at f4.0, and is supposedly better quality than the 18-55mm Kit lens that the camera came with.
I would sincerely doubt that an M 50mm f/2 with a 2x TC is going to be better than the kit lens. "Kit" lenses get a lot of bad press because they are often compared to far more expensive gear. The reality is that the Pentax kit lenses are quite good and very capable of good images. After all the M 50mm f/2 WAS the "kit" lens back in the day. Add a TC to it and you have severely degraded the possible IQ. Without the TC, maybe similar to the 18-55 but not with the TC on.
Manual focus on modern DSLRs is far more difficult than it was on film cameras for a number of reasons. The viewfinder and the focusing screen are designed for AF lenses not manual focus. Focus peaking, as noted above, can help but lots of practice is required.
If you want advice, put the kit lens on and start practicing. There is no added cost to shoot as with film and it is a great learning tool as you can try something and look at the results on the computer almost immediately. Your camera / lens is capable of excellent images so if you are struggling, post some examples and ask for a critique it might be something easily spotted.