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12-02-2008, 01:14 PM   #1
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180 degree diagonal fish-eye.

As the topic says. What's the best 180 degree diagonal fish-eye lens for Pentax? And I mean. THE best! :P Forget the price.

12-02-2008, 02:35 PM   #2
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180 degrees diagonal on APS-C? That narrows the choices substantially. There are only a couple and I have no idea regarding which is best. With a fisheye, even "good" is a relative term since most lenses in that class are a study in compromise.

Steve
12-02-2008, 02:40 PM   #3
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TBH I don't know what "on APS-C" means...
12-02-2008, 02:57 PM   #4
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QuoteOriginally posted by Nimrad Quote
TBH I don't know what "on APS-C" means...
APS-C is the sensor format on Pentax digital SLRs. It has the same ratio of length to width as 35mm film, but is 2/3 the size. As a result the field of view on APS-C is always narrower than on 35mm film. For example, my Zenitar 16/2.8 Fisheye has 180 degrees FOV on 35mm film, but only about 110 degrees on APS-C. Fisheye lenses for APS-C generally have a focal length of 10mm or less.

Steve

12-03-2008, 04:00 AM   #5
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QuoteOriginally posted by Nimrad Quote
As the topic says. What's the best 180 degree diagonal fish-eye lens for Pentax? And I mean. THE best! :P Forget the price.
I have just got the 10-17 fisheye zoom. It is a good fisheye, but also has the flexibility to work as an ultrawide. At 17mm the distortion can be eliminated giving a ~95 degree angle of view. Its a very flexible and interesting lens to use.
12-03-2008, 02:44 PM   #6
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If you want autofocus, you will be pretty much limited to Pentax and Sigma. Pentax has the DA 10-17mm and the old FA 17-28mm fisheye zooms. Sigma has the 15mm fisheye and the 10mm that is due out in Pentax mount. Sigma also has the 4.5 circular fisheye that is supposed to be available in Pentax mount.

If mf is o.k., there are some older fisheyes out there including Pentax.

Edit: This Sigma 10mm will be 180 degree with the Pentax mount http://www.sigmaphoto.com/lenses/lenses_all_details.asp?id=3337&navigator=6

The Sigma 15mm fisheye is apparently out of production for the Pentax mount, but some new ones for Pentax are available. However, they are full frame and won't be 180 degrees on Pentax digital bodies.

http://www.bhphotovideo.com/c/product/407597-USA/Sigma_476109_15mm_f_2_8_EX_DG.html#features

Last edited by Blue; 12-03-2008 at 02:50 PM.
12-03-2008, 07:23 PM   #7
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QuoteOriginally posted by jfsavage Quote
I have just got the 10-17 fisheye zoom. It is a good fisheye, but also has the flexibility to work as an ultrawide. At 17mm the distortion can be eliminated giving a ~95 degree angle of view. Its a very flexible and interesting lens to use.
Same here, except I've had it a while, and distortion can be minimized but not eliminated at 17mm. With careful placement of the only 2 straight lines in the image, even at 10mm it can look "almost" not fisheye.

First day with it. 10mm
Attachment 23376

17mm.
Attachment 23377

Last edited by SpecialK; 09-05-2016 at 06:27 PM.
12-04-2008, 03:30 AM   #8
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Yeah, well, I WANT it to be fish-eye. I don't want an ultra-wide. Especially 17mm ultrawide is unnecessary as I already have a 16-50. I think I'll have a look at the new Sigma 10mm. It looks pretty nice

02-15-2009, 01:13 AM   #9
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What do you think has the most fish-eye effect of the Sigma 10mm vs the Pentax 10-17 mm @ 10 mm? Exactly the same?
02-15-2009, 05:25 AM   #10
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QuoteOriginally posted by Nimrad Quote
Yeah, well, I WANT it to be fish-eye. I don't want an ultra-wide. Especially 17mm ultrawide is unnecessary as I already have a 16-50. I think I'll have a look at the new Sigma 10mm. It looks pretty nice
Here are a few taken with the Pentax DA 10-17mm fisheye lens.

At an air show. The lens is less than a foot away from the nose cone.


Recently taken in Havana, Cuba. This is as fishy as you can get!


Another one from Havana.


The front of a church in Montreal.


...anyway, you get the idea. If you want fishy-pics then get a fisheye lens; it's lots of fun.
02-15-2009, 03:15 PM   #11
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Woooooonderful!!! Definately getting one of these! Just a matter of when!
02-15-2009, 08:43 PM   #12
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Here is my fish eye shot

02-15-2009, 09:07 PM   #13
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roentarre - wow, thats kinda freaky, lol
02-15-2009, 09:25 PM   #14
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Great colours from the 10-17 there James.

And for those who haven't seen, a couple I've taken with this gem are here:
http://i163.photobucket.com/albums/t288/ashsaleh/Ride-Gold-Coast4-red-border.jpg
http://i163.photobucket.com/albums/t288/ashsaleh/Q-one4.jpg
http://i163.photobucket.com/albums/t288/ashsaleh/Q-one-views13.jpg
02-16-2009, 01:28 AM   #15
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QuoteOriginally posted by Blue Quote

Edit: This Sigma 10mm will be 180 degree with the Pentax mount Sigma - Lenses
Given that this lense has a lens hood, I would say so it's not covering 180 horizontaly. It is almost impossible to build such a lense for SLR, given the fact that the image projected is a circle and that the sensor is taking a crop of that image. It would mean that on the horizontal axis, the projected image would be mor than 180...

Even the 4.5mm circular fisheye is not covering 180, more like 170.

The Pentax 10-17mm is covering about 160 and I already wasted a lot of shots because you can see my finger turning the focusing ring...

Regards,
Guillaume
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