eric_goldstein1

<p>Alan, I have to congratulate you, that is one of the best descriptions of the chemistry behind photo developing that is A) only 4 short paragraphs long B) easily understood by the lay person.</p>

<p>For travel on the go I use an oversized Lumbar bag from LLBean (not made any more) but mountainsmith makes a great one<br> https://www.bhphotovideo.com/c/product/1092730-REG/mountainsmith_12_10036r_52_day_tls_lumbar_bag.html<br> inside that I have a generic holster case that i just leave unzipped and a lens pouch. My bag holds the camera, 1-2 lenses and a flash. The great advantage to the lumber pack is that you can add backpack straps for when you are walking longer distances or slip the pack straps off leaving just the waist strap, which you can wear on your side for easy access.<br> For a lightweight tripod, try a trekking pole with a camera mount, if you need it a bit more sturdy, take 2 pieces of string and attach them to a washer. If tripod is needed, put the washer on the camera mount before putting your camera on the trekking pole monopod, then stand on the other ends of the strings. I wouldn't go taking time lapse pics like this but it should hold down to 1/4 second. Not only do you have a workable tripod in a pinch but a trekking pole too.</p>

<p>I've rented the Profoto D1 Air and had them running with the modeling light going for up to two hours at time with no problem. As I was renting them I didn't have a warning about their heat, and there wasn't an issue with putting them away at the end of the shoot.</p> The shoots for which I was renting them were Bar/Bat Mitzvah formals (so obviously not professional models) and there is no problem with the sound of the strobes making the subjects uncomfortable it's not that loud. Unless the room is really really dark the light difference between the strobes and the ambient lighting shouldn't be that great. Keep in mind that unlike hot shoe flash which can blind, the lights this powerful are best diffused further reducing the blinding flash effect.

<p>I'll second the theory that it is as much the lens as it is the camera. A lens with a larger aperture allows more light in with which to focus.<br> As the owner of a 7100 and a D80 (certainly worse focusing than the D5100), if I go into a low light room and put my 35 1.8 on the D80 and my 18 - 135 kit on the 7100, the D80 will focus fairly well and the 7100 will hunt. <br> Before the feedback, yes i realize if I reverse the lenses and put the 35 1.8 on the 7100, it will focus far faster than the D80 did, and the D80 will be far slower than the 7100 was, but that's not the point here, only that the maximum aperture can significantly increase focusing in poor light.</p>