Lens comparison
May 16, 2014 14:44:04 #
I'm learning from this thread that it probably isn't the fault of the lens, I just didn't know how to use it properly. as soon as I get a chance, I'll take all of the great advice I've gotten here on this thread and try putting it to use.
May 16, 2014 14:45:09 #
amehta
Loc: Boston
rocketride wrote:
OK, so it's not a mirror lens. The mirrors, if present, would be obvious looking in from either end, and mirror lenses are generally quite short and stubby for their focal lengths. (That's one of their big selling points.)
Bummer! I was having fun deciphering all the stuff about Strehl levels. :-D
May 16, 2014 14:48:28 #
I'm learning from this thread that it probably isn't the fault of the lens, I just didn't know how to use it properly. as soon as I get a chance, I'll take all of the great advice I've gotten here on this thread and try putting it to use.
May 16, 2014 14:48:32 #
amehta
Loc: Boston
Tom Brownell wrote:
I don't know rocketride, there don't seem to be a mirror in it, it's pretty long and skinny from the bigger lens in front to the camera mount. I don't think it's a mirrored lens
B&H has three Bower 500mm lenses:
1. Bower 500mm f/8 Manual Focus T-Mount refractor lens
2. Bower 500mm f/8.0 Manual Focus T-Mount mirror lens
3. Bower 500mm f/6.3 Manual Focus T-Mount mirror lens
You have #1, it seem.
May 16, 2014 14:52:59 #
yup, that's the one. Hey, if I click on the blue "Reply" link below a response, does it stay in this thread. (as opposed to using Quick reply)
May 16, 2014 15:00:00 #
amehta
Loc: Boston
Tom Brownell wrote:
yup, that's the one. Hey, if I click on the blue "Reply" link below a response, does it stay in this thread. (as opposed to using Quick reply)
Yes, both "Reply" and "Quick Reply" stay in this thread. The only difference is that the comment you clicked from is included as a quote.
May 16, 2014 15:03:12 #
Gene51, This is a really long shot of eagles out over the water by my place. I noticed that you like using your 80-400mm lens hand held for BIF shots. This shot was from, I would guess, at least 500-600 feet away with 300mm nikkor af lens on on auto. It's cropped a bunch. my question to you is: could this be better on some other setting?
May 16, 2014 15:15:06 #
amehta wrote:
Bummer! I was having fun deciphering all the stuff about Strehl levels. :-D
Welcome to my world. :-D
May 16, 2014 15:18:55 #
Tom Brownell wrote:
Gene51, This is a really long shot of eagles out over the water by my place. I noticed that you like using your 80-400mm lens hand held for BIF shots. This shot was from, I would guess, at least 500-600 feet away with 300mm nikkor af lens on on auto. It's cropped a bunch. my question to you is: could this be better on some other setting?
Tom, other than an + one stop exposure adjustment, it looks fine. I would also turn off VR if you have it, you will get better results when shooting things that move and involve you needing to pan.
May 16, 2014 15:23:06 #
amehta
Loc: Boston
rocketride wrote:
Welcome to my world. :-D
It's a world I avoided (observational astronomy). :-D
May 16, 2014 15:27:19 #
Yes I have vr. what does that do to the image? I thought I needed that! or is that only for slower shutter speeds?
May 16, 2014 15:41:18 #
Tom Brownell wrote:
Yes I have vr. what does that do to the image? I thought I needed that! or is that only for slower shutter speeds?
It's really only useful for static or slowly moving things. It minimizes camera shake. I hate it and never use it.
May 16, 2014 16:37:31 #
Gene51 wrote:
It's really only useful for static or slowly moving things. It minimizes camera shake. I hate it and never use it.
If you're handholding (and not panning), stabilization will counteract your shakiness. And this is a GOOD THING.
If you're panning, most VR (IS, OS, etc) systems will interpret the motion as, well, motion and try to fight it. With variable effect.
If the camera is on a tripod, VR is unneeded and most systems tend to "tremor" a little. Noise in the sensors gets interpreted as tiny motions which the stabilizers try to counteract. This may make your photo a little less sharp than if nothing in the lens were moving. Also running stabilization while on a tripod runs your battery down needlessly
May 16, 2014 22:51:43 #
whiplash3333
Loc: Cass City Michigan
It is so true! You always get what you pay for. If you don't think so YOU ARE ONLY KIDING YOURSELF !
May 16, 2014 23:19:03 #
whiplash3333 wrote:
It is so true! You always get what you pay for. If you don't think so YOU ARE ONLY KIDING YOURSELF !
If you really believe that you better stay away from ebay and a few other sites on the web. I've seen the same merchant price the same piece of merchandise including cameras at 3 or 4 different prices with one of them considerably higher than the other prices just hoping for you to come along and buy at that higher price. There are a slew of online merchants doing that and they're waiting for you as we speak. :roll:
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