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11-25-2009, 01:06 PM   #1
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Wide-angle lens for K-7

I am considering purchasing a wide angle lens (either 10-17 mm zoom or 12-24 mm zoom) for my K-7, which, incidentally, I just love.

Both Pentax and Brother make a 10-17 mm lens. I have never heard of Brother lenses. Has anyone tried them? If so, how do they compare?

I am a little confused because on the Dell site, it says it's a Brother lens (Brother DA 10-17mm F3.5-4.5 ED (IF) SMC) but the info says this: "Give your photography a new look with the DA 10-17MM F3.5-4.5 ED (IF) SMC Fish-Eye Zoom Lens from Pentax."

Pentax 10 17 millimeters wide angle lens Camera Lenses at BizRate - Shop online for Computers & Software. Compare Prices and Read Consumer Reviews

Sigma has both a 12-24 mm and a 10-20 mm. Pentax has a 12-24 mm.

Sigma - Lenses
(What does HSM mean? I have tried to find if the K-7 has this.)

I have an 18-55 mm lens and, therefore, am thinking perhaps the 10-17 mm or the 10-20 mm might be the way to go.

Thanks in advance for suggestions.

11-25-2009, 01:40 PM   #2
Damn Brit
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10-17 isn't a normal lens, it's a fisheye lens, you should google that and read up on it before buying.
What sort of pictures do you want to take with such a wide lens?
11-25-2009, 02:11 PM   #3
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Do a search. Currently there are several options, each has its own fans:

- Sigma 10-20mm (old model)
- Sigma 10-20mm HSM (current model)
- Pentax DA 12-24mm
- Tamron 10-24mm

- Pentax DA 10-17mm - this is a fish-eye lens.

Of course there are always prime lenses:

- Pentax DA 21mm
- Pentax DA 15mm
- Pentax DA 14mm

There are also old FF models, back in the film days.

HSM is Sigma counterpart of Pentax DSM: the auto focus mechanism of the lens is driven by a motor in the lens instead of the screwdrive from the camera body. The good thing is that it is quiet. The bad thing is that the technology is fairly new/unproven to Pentax. Note that HSM/DSM does not neccessarily means faster autofocus.
11-25-2009, 02:35 PM   #4
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I had the DA 14mm f2.8.. Great lens. But when I got the DA* 16-50mm... the gap between 14mm and 16 mm is not that big of a deal... So I sold the DA 14mm to get the DA 12-24mm better options for landscapes. I also have the DA 10-17m FE.. For those shots that need some fun in it.

11-25-2009, 02:38 PM   #5
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QuoteOriginally posted by windflower Quote
I am considering purchasing a wide angle lens (either 10-17 mm zoom or 12-24 mm zoom) for my K-7, which, incidentally, I just love.

Both Pentax and Brother make a 10-17 mm lens. I have never heard of Brother lenses. Has anyone tried them? If so, how do they compare?

I am a little confused because on the Dell site, it says it's a Brother lens (Brother DA 10-17mm F3.5-4.5 ED (IF) SMC) but the info says this: "Give your photography a new look with the DA 10-17MM F3.5-4.5 ED (IF) SMC Fish-Eye Zoom Lens from Pentax."

Pentax 10 17 millimeters wide angle lens Camera Lenses at BizRate - Shop online for Computers & Software. Compare Prices and Read Consumer Reviews

Sigma has both a 12-24 mm and a 10-20 mm. Pentax has a 12-24 mm.

Sigma - Lenses
(What does HSM mean? I have tried to find if the K-7 has this.)

I have an 18-55 mm lens and, therefore, am thinking perhaps the 10-17 mm or the 10-20 mm might be the way to go.

Thanks in advance for suggestions.
I have the K-7 and 10-17, and they make a great combination. That said, you have to either like (and want) the fisheye effect at the wide end of that range, or know how / have the software to defish an image.

As you approach 17mm, the 10-17mm has relatively much less distortion.

Oh, and I noticed the Dell thing myself the other day. It's not a Brother lens, it is the Pentax lens misclassified as being Brother.
11-25-2009, 05:32 PM   #6
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Agreed. Dell screwed up the classifications.

If you search "Pentax" on their site, you get some Brother Pentax scanners and printers...

You can see in the pictures that the lenses are branded "Pentax"
11-25-2009, 07:36 PM   #7
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For an undistorted wide angle lens (at least much less than a fish eye lens), I too would vouch for the Pentax 12-24 if you can afford it, or the Tamron 10-24 or Sigma 10-20 for Pentax.

All are capable ultrawides and will complement rather than replace your kit lens.
11-25-2009, 10:51 PM   #8
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QuoteOriginally posted by SOldBear Quote

- Sigma 10-20mm (old model)
- Sigma 10-20mm HSM (current model)
- Pentax DA 12-24mm
- Tamron 10-24mm

- Pentax DA 10-17mm - this is a fish-eye lens.

Of course there are always prime lenses:

- Pentax DA 21mm
- Pentax DA 15mm
- Pentax DA 14mm
Add to the list

AF
Sigma 12-24mm
Sigma 14mm
Tamron 14mm
Sigma 8mm fisheye
Sigma 10mm fisheye
Sigma 15mm Diagonal fisheye
Sigma 4.5mm Circular Fisheye

MF

Samyung/Rokinon/Bower/... 8mm F3.5 Aspherical Fisheye Lens
Peleng 8mm f3.5 Fisheye
Zenitar 16mm f2.8 Fisheye

I kind of think 24mm in 135 format is wide, so I would include the Pentax DA 16-45mm and the DA 16-50mm as wide lenses.

Thank you
Russell

11-26-2009, 10:02 AM   #9
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I have both the 10-17 and the 12-24 from Pentax. They are complementary lenses in my view, because of the field of view.

The 10-17 FE - is a fish eye lens, with a field of view from 180 to 100 degrees. The FE effects are heavy at the 10 end and fairly light at the 17 end (but still there). One aspect of this lens is the ability to frame very LARGE object while being VERY close to them. Also, you can control the "bend" within the image depending on how you frame the object, i.e., placing the bend to the top, middle or the bottom of the image.

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/33549-fisheye-...ye-photos.html

The 12-24 is a rectilinear lens with a field of view from 100 to 60 degrees. To me it is a very sharp lens, while others see distortions at the edge (my opinion - depends on what the subject is).

I have seen some excellent images from the other lenses, but never have used them. There are excellent threads on their comparisons here.

11-27-2009, 12:26 AM   #10
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Original Poster
Thanks

Thanks all for your responses.

I have decided to go with the Pentax 10-17. I know it is a fish eye lens and I am looking forward to experimenting with it.
11-27-2009, 03:05 AM   #11
Damn Brit
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Good luck.
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