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Old Aug 7, 2008, 11:30 AM   #11
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This should be fun. I'll have a reason to put the kit lens on and try some wide shootin'.....Don
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Old Aug 7, 2008, 5:48 PM   #12
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Here is my first attempt, shot with the kit lens at 55mm it should cause a few chuckles.


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Old Aug 7, 2008, 6:09 PM   #13
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:lol::lol::lol::lol::lol:

Now that's a WIDE shot. And it gives me another idea to explore, one I hadn't thought of. You're making this difficult, you know...
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Old Aug 7, 2008, 6:30 PM   #14
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Very cool idea!

Dennis
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Old Aug 8, 2008, 2:21 AM   #15
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Monza76 wrote:
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it should cause a few chuckles.
It did, wonderful shot!

Kjell
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Old Aug 8, 2008, 9:23 PM   #16
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I hope this qualifies as wide, it's as wide as my 28mm prime gets from this stand point.

This is a part of of the town of Torbay.

Pretty much adjacent to St. John's, Capital City.

Ira that's pretty neat :idea:



Mike


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Old Aug 9, 2008, 2:54 AM   #17
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I decided to change my photo. This is to me a bit more interesting than the cathedral. DL with the Tamron 24-135 at 24mm.

Glenn



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Old Aug 9, 2008, 4:51 AM   #18
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Mike, very nice shot. It is plenty wide to me! Very expansive!

Glenn, also very well done. Beautiful old architecture.

Dennis
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Old Aug 9, 2008, 7:10 AM   #19
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Thanks Dennis, I don't use the kit lens much any more because of the darkened corners. I use this vivitar most now although it is not as wide.

Mike

Here is a shot were I would have preferred the wide angle to show more of the sea side landscape. Both shots posted were taken yesterday during a moutain bike ride to flatrock. I didn't enter it because it didn't seem WIDE. First I was going to get a long range lens for wildlife, but I think after a couple of years of shooting I'm more drawn to landscape. So a question if I could and if it's appropriate. What is the minimal focal length of a lens before the fish eye effect begins? I'd like to get as wide as possible without the fisheye effect.



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Old Aug 9, 2008, 7:52 AM   #20
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Island Brook Trout wrote:
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What is the minimal focal length of a lens before the fish eye effect begins? I'd like to get as wide as possible without the fisheye effect.
It isn't really about focal length but angle of view. A fish eye lens has two distinct characteristics:

1 - A field of view approaching 180 degrees
2 - Massive uncorrected barrel distortion due to the extreme angle of view.

Pentax has a 10-17mm fisheye, Sigma has a 10-20mm rectilinear (non-fisheye). At 10mm the focal lengths of both lenses are the same but the Sigma only covers about a 100 degree field of view while the Pentax (due to the uncorrected barrel distortion) can viewnearly 180 degrees. [Any errors in detail do not effect the explanation].

What this means is that corrected wide angle lenses can have very short focal lengths (Canon has a 10mm for a full 35mm film frame) and fisheyes can have rather long focal lengths (the old Pentax FA fisheye zoom had a widest angle of 17mm but was a fisheye for a full 35mm film frame, on digital it is just a very wide angle with lots of barrel distortion)

Ultra Wide (non-fisheye) lenses for Pentax:

DA 12-24mm,
DA 14mm,
Sigma 10-20mm
Anyone have any to add to this list?

Hope this helps.

Ira
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