| Author | Thread |
|
|
06/07/2005 12:04:48 PM · #26 |
Originally posted by kyebosh:
bear that sample has some ugly ugly bokeh :-( |
Eye of the beholder I guess, I find the bokeh attractive in a weird-but-useful way. Yoyu oughta see what it can do with point sources of light lOL. Actual rings of bokeh..
R.
|
|
|
|
06/07/2005 12:06:52 PM · #27 |
There are, somehwere, some great rock'n'roll photos using mirror stuff - that effect you mention Robert. Damned if I can remember where or who took them though ...
e |
|
|
|
06/07/2005 12:09:07 PM · #28 |
Yeah, I been looking for 'em too. Blast from the past. No joy yet. Damn... I remember when these lens were an "everyone-gotta-have-one" item, they were like opening a whole new WORLD for us.
Robt.
Message edited by author 2005-06-07 12:09:46.
|
|
|
|
06/07/2005 12:24:26 PM · #29 |
| It is worth mentioning that if you have an interest in IR or UV photography, mirror lenses (Reflex or catadioptric) do not require refocusing. Also they can be useful in high contrast situations given their inherit lower contrast plus they have virtually no chromatic aberration. |
|
|
|
06/07/2005 02:15:21 PM · #30 |
What Kribic said earlier in this thread.
Stay away from the low priced crap lenses that started this thread. If you really want something with a nice long focal length, but don't want to fork out the big bucks for a genuine camera lens, spring for a Celestron C5 and a t-adapter for your camera. Then you have a very nice telescope for terrestrial or celestial use, as well as a kick-ass long lens when you want to stick it on your camera. Down-side? It's an f/10 instrument so you probably won't be stopping any humming bird wings with it.
Price it out here.
edit: sorry, this scope is a 1,250mm focal length. Now that's alotta lens!
Message edited by author 2005-06-07 14:20:04. |
|
|
|
06/07/2005 02:30:43 PM · #31 |
Well for doing semi macro work, that Sigma seems to do just fine.
flower |
|
|
|
06/07/2005 03:16:47 PM · #32 |
Originally posted by bear_music:
Originally posted by PaulMdx:
The Vivitar 500 Mirror gets a fair old slating..
Here's some mirror lenses on B & H
I'm curious how well the Sigma 600mm Mirror performs.. |
The Sigma's a 600mm f:8 for just under $400.00. The Vivitar is 500mm f:8, for $109.00. The Vivitar, from all I've hard, is a piece of junk, and I believe it at that price, but what I've heard of the sigma is very enticing. If you're running a 1.5 ratio on sensor size, which is in the ballparl of most dSLRs, that Sigma is 900mm for less than $400.00 PLUS they are lighweight and compact, which is definitely NOT true of 1000mm conventional telephoto lenses...
Robt.
Those samples seem pretty decent to me for the price. They are definitely useable pictures. here's one that shows the bokeh well:
Sigma Catadioptric Image
R. |
Just wanted to point out that when I referred to the Vivitar "Solid Cat" I was referring to this lens, a venerable member of the Vivitar "1 series" that was actually manufactured by Perkin Elmer. They were expensive then, and are rare collector's items now.
|
|
|
|
06/07/2005 03:24:07 PM · #33 |
I used to have the Sigma 600mm Mirror lens some years ago, used it with my film Canon Eos620...it was a pretty good performer for the price, but it needed plenty of light, think it was f8.
Still, it's not too dear, so might be worth a try, could always sell it on eBay later if it don't suit.
Steve |
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 09/17/2025 03:21:45 PM EDT.
