Extreme Wide Angle wanted
Posted 11/05/2010 - 17:12 - Helpful Comment
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Pentax 10-17mm, no question. Super sharp & awesome colour rendition.
Ignore the fact that it's "only" 10mm at the wide end, it is a misleading measurement where fisheyes are concerned. The actual field of view will be much, much, wider than your Sigma. 180 degrees in fact.
Forget your previous fisheye adapter experience. This is one of the sharpest lenses that Pentax currently manufacture imho.
Ignore the fact that it's "only" 10mm at the wide end, it is a misleading measurement where fisheyes are concerned. The actual field of view will be much, much, wider than your Sigma. 180 degrees in fact.
Forget your previous fisheye adapter experience. This is one of the sharpest lenses that Pentax currently manufacture imho.
Posted 11/05/2010 - 17:17 - Helpful Comment
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THIS THREAD is full of plenty of good examples & praise for the 10-17mm
Posted 11/05/2010 - 17:43 - Helpful Comment
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I thought the Sigma 4.5mm was on its way for Pentax mount?
yes, it is
won't be cheap though (c. £600?), if you want a bit cheaper, there's some of the odd-brand stuff such as the
8mm Samyang.
yes, it is
won't be cheap though (c. £600?), if you want a bit cheaper, there's some of the odd-brand stuff such as the
8mm Samyang.
Still shooting in the dark (literally and metaphorically)...
Posted 11/05/2010 - 17:48
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flossie wrote:
I thought the Sigma 4.5mm was on its way for Pentax mount?
yes, it is
won't be cheap though (c. £600?), if you want a bit cheaper, there's some of the odd-brand stuff such as the
8mm Samyang.
Umm not sure, having seen what RR has sent, I'd need to look at the AOV, I think Park Camera's currently offer the 4.5mm albeight in non PK mounts around £499.
I thought the Sigma 4.5mm was on its way for Pentax mount?
yes, it is
won't be cheap though (c. £600?), if you want a bit cheaper, there's some of the odd-brand stuff such as the
8mm Samyang.
Chris
www.chrismillsphotography.co.uk
" A Hangover is something that occupies the Head you neglected to use the night before".
-------------------------------------------------------------
K1 - Sigma 85mm F1.4, Pentax DFA 150 -450 F4.5 / 5.6, Pentax DFA* 24 - 70 F2.8
Samyang 14mm F2.8, Pentax DFA* 70-200 F2.8, Pentax A 50mm F1.2
K3iii + K3ii + K5iis converted to IR, Sigma 17 - 70 F2.8, Pentax 55 - 300 F4.5 / F5.6 PLM
www.chrismillsphotography.co.uk
" A Hangover is something that occupies the Head you neglected to use the night before".
-------------------------------------------------------------
K1 - Sigma 85mm F1.4, Pentax DFA 150 -450 F4.5 / 5.6, Pentax DFA* 24 - 70 F2.8
Samyang 14mm F2.8, Pentax DFA* 70-200 F2.8, Pentax A 50mm F1.2
K3iii + K3ii + K5iis converted to IR, Sigma 17 - 70 F2.8, Pentax 55 - 300 F4.5 / F5.6 PLM
Posted 11/05/2010 - 18:03
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The 4.5mm is a full circular fisheye for crop cameras isn't it ?
That means you'd get a circular image with dark corners, pretty specialist use I'd think.
The angle of view of the sigma 10-20mm is 102.4 degrees at 10mm.
The AOV of the 10-17mm fishy is 180-100 degrees across the zoom range, so considerably wider.
That means you'd get a circular image with dark corners, pretty specialist use I'd think.
The angle of view of the sigma 10-20mm is 102.4 degrees at 10mm.
The AOV of the 10-17mm fishy is 180-100 degrees across the zoom range, so considerably wider.
Posted 11/05/2010 - 18:03
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Ok, see what you mean, looks like I need to try the Pentax, Thank you for a Very Quick response.
Posted 11/05/2010 - 18:06
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How is 10mm a 180 degree on a fisheye but not on a rectilinear lens? I thought that 10mm is 10mm, isn't it? I must be missing something ...
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8
Posted 11/05/2010 - 18:57
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I read somewhere that for fisheye lenses the focal length can be misleading and it is better to use the angle of view.
If you can't say something nice about Pentax, you won't say anything at all.
Apparently.
Apparently.
Posted 11/05/2010 - 19:10
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whelmed wrote:
How is 10mm a 180 degree on a fisheye but not on a rectilinear lens? I thought that 10mm is 10mm, isn't it? I must be missing something ...
The 10-20 Sigma is rectilinear, flat field of view, where as the Pentax 10-17mm Fisheye is distoted heavily and is supposed to be that way. The 180 degree field of view is actually measured across the frame diagonally, which means you get somewhere in the region of 145-150 degrees horizontal view. Hope this helps.How is 10mm a 180 degree on a fisheye but not on a rectilinear lens? I thought that 10mm is 10mm, isn't it? I must be missing something ...
John
Posted 11/05/2010 - 19:46
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There is also a Sigma 8-16 coming I believe.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 11/05/2010 - 20:21
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Anvh wrote:
There is also a Sigma 8-16 coming I believe.
Yep - £650-ish but no release date yet. FWIW I absolutely adore my recently-purchased 10-20.
There is also a Sigma 8-16 coming I believe.
Posted 11/05/2010 - 21:14
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The fisheye lens has a different projection than the rectilinear lenses, so focal length does not reflect field of view in the way we expect.
Just think of them as the exceptions that prove the rule.
Just think of them as the exceptions that prove the rule.
Best regards, John
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2115 posts
16 years
St Austell,
Cornwall
I've a Sigma 10-20 which is great and love the effect when wide, hence fancy going a tad wider, I know I won't use it all the time, but could justify the cost ..... almost to myself anyway.
I did have a Fish-eye adaptor some years back, which screwed onto the front of a 50mm, but the quality was fairly awful, so my Q is,
Any suggestions ? quite happily go down the used route or does anyone know different please.
www.chrismillsphotography.co.uk
" A Hangover is something that occupies the Head you neglected to use the night before".
-------------------------------------------------------------
K1 - Sigma 85mm F1.4, Pentax DFA 150 -450 F4.5 / 5.6, Pentax DFA* 24 - 70 F2.8
Samyang 14mm F2.8, Pentax DFA* 70-200 F2.8, Pentax A 50mm F1.2
K3iii + K3ii + K5iis converted to IR, Sigma 17 - 70 F2.8, Pentax 55 - 300 F4.5 / F5.6 PLM