From: Wolfgang Weisselberg on
Shane <atldal3(a)bresnan.net> wrote:
> Has anyone had any experience with a Opteka High Definition 650-1300mm Super
> Telephoto Zoom Lens. If not, how about any of the other lenses like this or
> any of the spotting scope lenses.

Observe the price of a Canon 500mm lens.
Observe the price of a Canon 800mm lens.
Observe the price of a Canon 1200mm lens (if you can get such
a beast at all).
Observe the price of the above mentioned lens.

Draw your own conclusions.

-Wolfgang
From: RichA on
On Dec 22, 8:54 pm, "J. Clarke" <jclarke.use...(a)cox.net> wrote:
> Michael Tuthill wrote:
> > On 2009-12-22 10:15:51 -0700, Wolfgang Weisselberg
> > <ozcvgt...(a)sneakemail.com> said:
>
> >> Shane <atld...(a)bresnan.net> wrote:
> >>> Has anyone had any experience with a Opteka High Definition
> >>> 650-1300mm Super Telephoto Zoom Lens.  If not, how about any of the
> >>> other lenses like this or any of the spotting scope lenses.
>
> >> Observe the price of a Canon 500mm lens.
> >> Observe the price of a Canon 800mm lens.
> >> Observe the price of a Canon 1200mm lens (if you can get such
> >> a beast at all).
> >> Observe the price of the above mentioned lens.
>
> >> Draw your own conclusions.
>
> >> -Wolfgang
>
> > Canon's ripping it's users off?:-)
>
> Google 650-1300 opteka review and you'll find lots of discussion.  Bottom
> line--it's a lens, it functions, it makes dandy truncheon, and that's about
> all the good that anybody's said about it.  Heavy, no aperture iris, manual
> focus only, f/8-16 depending on zoom, lots of chromatic aberration,
> considerable flare, and soft at best.
>
> http://photography-on-the.net/forum/showthread.php?t=103319is a long thread
> with some test shots.

It's a frigging antique, a throwback. While good lenses and
telescopes are now beyond first generation ED glass and have gone to
the latest (more fluorite-like) material, these old "girl watcher"
lenses are stuck in the flint-crown dark ages. Who can tolerate
lenses now that display noticeable chromatic aberration? Why would
they?
From: NameHere on
On Tue, 22 Dec 2009 16:43:38 -0600, Rich <none(a)nowhere.com> wrote:

>A DSLR can be mounted to a mirror lens of 1350mm focal length.

What mirror lens? However I found this one at the cost of $1800-$2100 and
the weight of 5.1 lbs. available ONLY for video cameras and small sensors
(1/2.5" the same as my P&S cameras), at f/4.0 at that. 2 EV stops smaller
aperture. Better get your higher noise-filled ISOs ready too. Zero
tele-macro capability too. Ooops. no optical image stabilization nor
auto-focus included. Aww... what a shame.

http://www.canon.com/bctv/products/digi72xs.html
http://www.dpreview.com/news/article_print.asp?date=0406&article=04062402kowprominartd1


Oh look! They have to attach it to their cameras with duct-tape! Now isn't
that a novel solution. LOL!

http://www.oceanwanderers.com/TD1Scope.6158.jpg

Here's more example that provide for the same or lesser image quality as
the two stacked telextenders on an inexpensive P&S camera.

http://www.oceanwanderers.com/KowaTD1.html

Whereas the full f/2.4 aperture and focal length can be had for under $200
and less than 2 lbs for all still frame P&S digital cameras (with video
included). Not to mention that it is bereft of those gawd-awful doughnut
shaped bokeh effects from catadioptric mirror lens systems (if you can find
one like that).

Sorry, you still lose. Go back to you whiney DSLR-Troll crying-board.


From: Michael Tuthill on
On 2009-12-22 10:15:51 -0700, Wolfgang Weisselberg
<ozcvgtt02(a)sneakemail.com> said:

> Shane <atldal3(a)bresnan.net> wrote:
>> Has anyone had any experience with a Opteka High Definition 650-1300mm Super
>> Telephoto Zoom Lens. If not, how about any of the other lenses like this or
>> any of the spotting scope lenses.
>
> Observe the price of a Canon 500mm lens.
> Observe the price of a Canon 800mm lens.
> Observe the price of a Canon 1200mm lens (if you can get such
> a beast at all).
> Observe the price of the above mentioned lens.
>
> Draw your own conclusions.
>
> -Wolfgang

Canon's ripping it's users off?:-)

From: J. Clarke on
Michael Tuthill wrote:
> On 2009-12-22 10:15:51 -0700, Wolfgang Weisselberg
> <ozcvgtt02(a)sneakemail.com> said:
>
>> Shane <atldal3(a)bresnan.net> wrote:
>>> Has anyone had any experience with a Opteka High Definition
>>> 650-1300mm Super Telephoto Zoom Lens. If not, how about any of the
>>> other lenses like this or any of the spotting scope lenses.
>>
>> Observe the price of a Canon 500mm lens.
>> Observe the price of a Canon 800mm lens.
>> Observe the price of a Canon 1200mm lens (if you can get such
>> a beast at all).
>> Observe the price of the above mentioned lens.
>>
>> Draw your own conclusions.
>>
>> -Wolfgang
>
> Canon's ripping it's users off?:-)

Google 650-1300 opteka review and you'll find lots of discussion. Bottom
line--it's a lens, it functions, it makes dandy truncheon, and that's about
all the good that anybody's said about it. Heavy, no aperture iris, manual
focus only, f/8-16 depending on zoom, lots of chromatic aberration,
considerable flare, and soft at best.

http://photography-on-the.net/forum/showthread.php?t=103319 is a long thread
with some test shots.