I have no first-hand experience with the lens in topic, but so far my
experience with mirror lens is they are mostly soft. Of course there are
differences, for example the f5.6/500 Rubinar is almost sharp (well
let's say it's sharp as the Canon kit lenses :D) and f8/500 Phoenix is
nowhere near
It's a Sigma Ultra Tel, I've seen one for sale on e-Bay a few years
ago. It went for a lot of money. They are relatively rare, probably
fewer were made than the Vivitar Series 1 450mm solid cat, there were
only 800 of those made. They have a reputation of being very, very,
very good.
On Nov 15, 2007, at 9:44, Thibouille wrote:
500f/4 mirror ? I'd be heaviliy suprised of a F/4 mirror lens.
Those are usually 500/600mm f/8 or 300/350mm f/5.6.
Did you look at the photo he linked to? Says 1:4 f=500mm right on the
front of it.
And there is a big handle on the top too, for
Depends how you define sharp :D Mirror bokeh is fine with me :D I like
donuts!
For me real sharpness starts around the 2.8/80 Biometar (the kit lens
for Pentacon Six TL). Or you can use the Carl Zeiss Jena Sonnar f2.8/180
for P6 or f3.5/135 Sonnar. I highly doubt any mirror lens will be able
- Original Message -
From: .timbercode
Subject: Re: Sigma 600mm f/8.0 Mirror Lens Sample Photos and Specifications
I have no first-hand experience with the lens in topic, but so far my
experience with mirror lens is they are mostly soft. Of course there are
differences, for example
It's huge dude.
Thibouille wrote:
No no I thought that it was a shot taken with that lens which wouldn't
helped much IMO so I didn't (how stupid) check.
That's the first time I see this, hence I'm indeed very surprised.
It'd be cool to see it attached to a camera to have a better idea of
William Robb wrote:
From: .timbercode
Depends how you define sharp :D Mirror bokeh is fine with me :D I like
donuts!
Sharp is defined as having high resolution.
sharpness is really a combination of resolution and acutance.
--
PDML Pentax-Discuss Mail List
PDML@pdml.net
sharpness is a bourgeois concept
-hcb
Mark Roberts wrote:
William Robb wrote:
From: .timbercode
Depends how you define sharp :D Mirror bokeh is fine with me :D I like
donuts!
Sharp is defined as having high resolution.
sharpness is really a combination of resolution and acutance.
Could you give some samples?
.t
William Robb wrote:
- Original Message -
From: .timbercode
Subject: Re: Sigma 600mm f/8.0 Mirror Lens Sample Photos and Specifications
Depends how you define sharp :D Mirror bokeh is fine with me :D I like
donuts!
Sharp is defined
My Vivitar S1 600mm solid cat seems, to me at least to lack contrast,
but is also very sharp. This can often be easily fixed in Photoshop,
though in certain circumstances the the donut bokeh is a bit disturbing.
Mark Roberts wrote:
William Robb wrote:
From: .timbercode
Depends
- Original Message -
From: [EMAIL PROTECTED]
Subject: Re: Sigma 600mm f/8.0 Mirror Lens Sample Photos and Specifications
Is there an optical reason why a mirror lens can't achieve high
resolution? I wouldn't think so. As Bill said, the only real drawback is
the bokeh
Thanks! Take your time :D
.t
William Robb wrote:
I'll have to dig the thing out and shoot something with it, I don't have
anything at hand from it.
Give me a day or two.
It will be interesting to see if it is as good on digital as I recall it
being on film.
William Robb
--
PDML
I think mirror lens have the realyl advantages (well more or less) of being:
* portable (but a bit too much, they are too lightweight for the focal
length IMO and as such difficult to stabilize). In the end you still
need a tripod which kinda negates the argument.
* cheap. and I think this is
PROTECTED]
- Original Message -
From: .timbercode
Subject: Re: Sigma 600mm f/8.0 Mirror Lens Sample Photos and Specifications
Depends how you define sharp :D Mirror bokeh is fine with me :D I like
donuts!
Sharp is defined as having high resolution.
William Robb
- Original Message -
From: .timbercode
Subject: Re: Sigma 600mm f/8.0 Mirror Lens Sample Photos and Specifications
Could you give some samples?
I'll have to dig the thing out and shoot something with it, I don't have
anything at hand from it.
Give me a day or two
- Original Message -
From: .timbercode
Subject: Re: Sigma 600mm f/8.0 Mirror Lens Sample Photos and Specifications
Depends how you define sharp :D Mirror bokeh is fine with me :D I like
donuts!
Sharp is defined as having high resolution.
William Robb
--
PDML Pentax-Discuss Mail
500f/4 mirror ? I'd be heaviliy suprised of a F/4 mirror lens.
Those are usually 500/600mm f/8 or 300/350mm f/5.6.
On Nov 15, 2007 1:54 PM, [EMAIL PROTECTED] wrote:
I do have a Simga 500mm F.4.0 mirror lens, which is sort of heavy and I do
like it.
Here is a link to to a photo of it on my
- Original Message -
From: Mark Roberts
Subject: Re: Sigma 600mm f/8.0 Mirror Lens Sample Photos and Specifications
Sharp is defined as having high resolution.
sharpness is really a combination of resolution and acutance.
I knew that.
William Robb
--
PDML Pentax-Discuss
I do have a Simga 500mm F.4.0 mirror lens, which is sort of heavy and I do like
it.
Here is a link to to a photo of it on my photo.net page.There are three photos
of it on that pageJoe
http://photo.net/photodb/photo?photo_id=5771640
-- Original message --
No no I thought that it was a shot taken with that lens which wouldn't
helped much IMO so I didn't (how stupid) check.
That's the first time I see this, hence I'm indeed very surprised.
It'd be cool to see it attached to a camera to have a better idea of
the size of the whole thing.
--
Thibault
There is a photo of it next to a 300mm F4.0 Pentax A Lens and a 16-45 Pentax
Lens. This should show it's size. There is also a a few photos taken with it of
cars parked in a lotJoe
-- Original message --
From: P. J. Alling [EMAIL PROTECTED]
It's a Sigma
Roman Melihhov wrote:
http://www.pbase.com/cameras/sigma/600_8_mirror
Anyone uses Sigma 600mm mirror lense? SR should help with shake. Judging
from other birding photos I saw bokeh isnt so nice, but somehow reminds
me DA 16-45mm bokeh, yeah this DA lense too has this weird donut type
http://www.pbase.com/cameras/sigma/600_8_mirror
Anyone uses Sigma 600mm mirror lense? SR should help with shake. Judging
from other birding photos I saw bokeh isnt so nice, but somehow reminds
me DA 16-45mm bokeh, yeah this DA lense too has this weird donut type
out-of focus highlights...
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