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casil403 · 10-17-2010, 05:38 AM

Originally posted by soppy

Straighten out that second one and it would be even more awesome than it already is! Great contrast and love how the light falls on the pipes until they fade away.

Hey thanks for the tip...did not even notice it wasn't level until you pointed it out!

rustynail925 · 10-17-2010, 08:40 AM

Trig · 10-18-2010, 10:16 AM

Here are 2 from last week:

**pacerr** · 10-20-2010, 09:37 PM

I had a Sigma 10-20/4-5.6 in hand for a few weeks and I agree that it's earned its reputation and place in its class. But I also stumbled on an irresistible deal on a Tamron SP AF 10-24 which is generally given lower marks in reviews and third hand advice.

These two lenses were my introduction to the UWA focal length range after all this time so I don't have an educated approach to the nit-picky UW stuff. After two days in the field using mostly available light and 200+ images each, most of the time I couldn't reliably tell the difference between the two lenses on the monitor without referring back to the originally recorded SD chips. There were just too many external variables that overrode any individual attributes of the lenses for me to prefer one over the other for overall optical quality.

I'd like to say I thought the Sigma might have been a tad sharper at the short end but its just as likely I was being swayed by the opinions I've seen on-line. Both lenses seemed to have situations they were particularly suited for and the extra 4mm at the top end made a noticeable difference for me with the Tamron.

Here's an image from one of them, picked because I had identical shots for both lenses and the color was almost exactly the same in both files. This has just been cropped with a bit of compensatory sharpening and exposure adjustment to match the two back-to-back JPG exposures in a K200D, ISO 400, 20mm, F 4.5 & 1/250 sec.

I couldn't tell one from the other after minimal PP-ing so the decision as to which to keep was based on functional attributes and cost. I'd have been pleased with either lens and the learning curve will be fun as I've come to UWA late in the game but I kept only one of 'em (for a change!).

Which one? Well, that's sort'a my point here as both were nearly identical in practical use. I'm gonna enjoy that extra 4mm regardless, but then, this IS a Sigma thread, huh?

H2

kiaa · 10-20-2010, 10:46 PM

Hi guys! I Just bought a copy of sigma 10-20/4-5.6. I took some shots using AF. I noticed when I focused on a greater distance the lens wont go to infinity which marked on the lens barrel(It shows"3ft" marked on the lens barrel when I focused infinity at 10mm. It shows"infinity" when I focused infinity at 20mm). Is that normal? Thanks.

axl · 10-21-2010, 03:14 AM

Originally posted by kiaa

Hi guys! I Just bought a copy of sigma 10-20/4-5.6. I took some shots using AF. I noticed when I focused on a greater distance the lens wont go to infinity which marked on the lens barrel(It shows"3ft" marked on the lens barrel when I focused infinity at 10mm. It shows"infinity" when I focused infinity at 20mm). Is that normal? Thanks.

My copy behaves very similarly. Thing is that DOF at 10mm is HUGE. Even at f 4 if you focus on 1m (roughly 3ft) the DOF is something like 70cm to infinity, by f5.6 it's 55cm to infinity and by f8 it's around 45cm to infinity. Practical advice if you use this lens exclusively at 10mm just set it to MF, 1m, f5.6-8 and shoot. Forget focusing.

PS: with f8 and smaller you can use MF 1m for 10-14mm zoom range without worrying about the focus... good luck!

kiaa · 10-21-2010, 07:52 AM

Originally posted by axl

My copy behaves very similarly. Thing is that DOF at 10mm is HUGE. Even at f 4 if you focus on 1m (roughly 3ft) the DOF is something like 70cm to infinity, by f5.6 it's 55cm to infinity and by f8 it's around 45cm to infinity. Practical advice if you use this lens exclusively at 10mm just set it to MF, 1m, f5.6-8 and shoot. Forget focusing.

PS: with f8 and smaller you can use MF 1m for 10-14mm zoom range without worrying about the focus... good luck!

Thank u very much,axl. Good advice. I am using MF now.

BTW: I tried again. Which confused me is that when i set it to "infinity" at 10mm, the picture is fuzzy(shooting on a greater distance). When i set it to "1m", pictures became normal. And this wont happen at 20mm. The picture is sharp when i set it to "infinity" at 20mm, on the contrary, the picture is fuzzy when i set it to "1m".

jgredline · 10-21-2010, 06:21 PM

well folks I sold my lens..I must admit I am sad over it. But I will continue to follow this wonderful thread and hope to see some images from my now sold lens here.

Jewelltrail · 10-23-2010, 10:33 PM

14mm

axl · 10-26-2010, 01:38 PM

Originally posted by kiaa

Thank u very much,axl. Good advice. I am using MF now.

BTW: I tried again. Which confused me is that when i set it to "infinity" at 10mm, the picture is fuzzy(shooting on a greater distance). When i set it to "1m", pictures became normal. And this wont happen at 20mm. The picture is sharp when i set it to "infinity" at 20mm, on the contrary, the picture is fuzzy when i set it to "1m".

you are very welcome...
the infinity on this lens is weird. I believe the lens can acutally focus past infinity. And the mark on that setting is rather unclear IMO...

axl · 10-26-2010, 01:39 PM

Originally posted by jgredline

well folks I sold my lens..I must admit I am sad over it. But I will continue to follow this wonderful thread and hope to see some images from my now sold lens here.

as sad as I am to read that, I have to admit I may very soon follow the suit...

jgredline · 10-26-2010, 01:42 PM

Originally posted by axl

as sad as I am to read that, I have to admit I may very soon follow the suit...

Since buying the DA15 I have not missed the Sigma one bit. I thought I would miss the 10-14 range, but have not.

axl · 10-26-2010, 01:47 PM

Originally posted by jgredline

Since buying the DA15 I have not missed the Sigma one bit. I thought I would miss the 10-14 range, but have not.

you are not helping here Javier!
the 15mm is exactly what I'm thinking of! I got FA*24 which seems to be great but it's large(ish) and to have 10-20 + 24 + 31 as my wide end is rather large combo so I'm thinking of DA15 to replace the Sigma, because like this I'm really tempted to leave the Sigma behind every time I take 24 and vice versa....

although I have to admit that IF I would see good deal on K/A15 I'd get in in the heart beat despite the bulk....

JHD · 10-26-2010, 05:48 PM

Why would someone replace the 10-20 with a DA15? Isn't that like selling a Bigma for a 200mm prime? For the record I have both the DA15 and the 10-20. And even though I prefer and shoot more often with the 10-20, I won't be selling my DA15.

Jewelltrail · 10-31-2010, 08:29 PM

I love this rock: f8, 2 seconds, 10mm ISO 100

10-20-2010, 09:37 PM	#874
pacerr Loyal Site Supporter Join Date: Jan 2008 Location: Paris, TN Photos: Gallery \| Albums Posts: 3,350	UWA twins I had a Sigma 10-20/4-5.6 in hand for a few weeks and I agree that it's earned its reputation and place in its class. But I also stumbled on an irresistible deal on a Tamron SP AF 10-24 which is generally given lower marks in reviews and third hand advice. These two lenses were my introduction to the UWA focal length range after all this time so I don't have an educated approach to the nit-picky UW stuff. After two days in the field using mostly available light and 200+ images each, most of the time I couldn't reliably tell the difference between the two lenses on the monitor without referring back to the originally recorded SD chips. There were just too many external variables that overrode any individual attributes of the lenses for me to prefer one over the other for overall optical quality. I'd like to say I thought the Sigma might have been a tad sharper at the short end but its just as likely I was being swayed by the opinions I've seen on-line. Both lenses seemed to have situations they were particularly suited for and the extra 4mm at the top end made a noticeable difference for me with the Tamron. Here's an image from one of them, picked because I had identical shots for both lenses and the color was almost exactly the same in both files. This has just been cropped with a bit of compensatory sharpening and exposure adjustment to match the two back-to-back JPG exposures in a K200D, ISO 400, 20mm, F 4.5 & 1/250 sec. I couldn't tell one from the other after minimal PP-ing so the decision as to which to keep was based on functional attributes and cost. I'd have been pleased with either lens and the learning curve will be fun as I've come to UWA late in the game but I kept only one of 'em (for a change!). Which one? Well, that's sort'a my point here as both were nearly identical in practical use. I'm gonna enjoy that extra 4mm regardless, but then, this IS a Sigma thread, huh? H2

10-23-2010, 10:33 PM	#879
Jewelltrail Veteran Member Join Date: May 2008 Location: Rhode Island Photos: Albums Posts: 4,180 Original Poster	14mm Last edited by Jewelltrail; 10-24-2010 at 04:17 AM.

10-31-2010, 08:29 PM	#885
Jewelltrail Veteran Member Join Date: May 2008 Location: Rhode Island Photos: Albums Posts: 4,180 Original Poster	Sigma 10-20mm I love this rock: f8, 2 seconds, 10mm ISO 100

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10-17-2010, 05:38 AM	#871
casil403 Veteran Member Join Date: Jan 2010 Location: Calgary AB Photos: Gallery Posts: 1,170	Originally posted by soppy Straighten out that second one and it would be even more awesome than it already is! Great contrast and love how the light falls on the pipes until they fade away. Hey thanks for the tip...did not even notice it wasn't level until you pointed it out!

10-17-2010, 08:40 AM	#872
rustynail925 Veteran Member Join Date: Aug 2009 Location: Philippines Photos: Gallery Posts: 1,551

10-18-2010, 10:16 AM	#873
Trig Senior Member Join Date: Aug 2009 Location: Acushnet, MA Photos: Gallery Posts: 211	Here are 2 from last week:

10-20-2010, 10:46 PM	#875
kiaa Inactive Account Join Date: Oct 2010 Posts: 3	Hi guys! I Just bought a copy of sigma 10-20/4-5.6. I took some shots using AF. I noticed when I focused on a greater distance the lens wont go to infinity which marked on the lens barrel(It shows"3ft" marked on the lens barrel when I focused infinity at 10mm. It shows"infinity" when I focused infinity at 20mm). Is that normal? Thanks.

10-21-2010, 03:14 AM	#876
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by kiaa Hi guys! I Just bought a copy of sigma 10-20/4-5.6. I took some shots using AF. I noticed when I focused on a greater distance the lens wont go to infinity which marked on the lens barrel(It shows"3ft" marked on the lens barrel when I focused infinity at 10mm. It shows"infinity" when I focused infinity at 20mm). Is that normal? Thanks. My copy behaves very similarly. Thing is that DOF at 10mm is HUGE. Even at f 4 if you focus on 1m (roughly 3ft) the DOF is something like 70cm to infinity, by f5.6 it's 55cm to infinity and by f8 it's around 45cm to infinity. Practical advice if you use this lens exclusively at 10mm just set it to MF, 1m, f5.6-8 and shoot. Forget focusing. PS: with f8 and smaller you can use MF 1m for 10-14mm zoom range without worrying about the focus... good luck!

10-21-2010, 07:52 AM	#877
kiaa Inactive Account Join Date: Oct 2010 Posts: 3	Originally posted by axl My copy behaves very similarly. Thing is that DOF at 10mm is HUGE. Even at f 4 if you focus on 1m (roughly 3ft) the DOF is something like 70cm to infinity, by f5.6 it's 55cm to infinity and by f8 it's around 45cm to infinity. Practical advice if you use this lens exclusively at 10mm just set it to MF, 1m, f5.6-8 and shoot. Forget focusing. PS: with f8 and smaller you can use MF 1m for 10-14mm zoom range without worrying about the focus... good luck! Thank u very much,axl. Good advice. I am using MF now. BTW: I tried again. Which confused me is that when i set it to "infinity" at 10mm, the picture is fuzzy(shooting on a greater distance). When i set it to "1m", pictures became normal. And this wont happen at 20mm. The picture is sharp when i set it to "infinity" at 20mm, on the contrary, the picture is fuzzy when i set it to "1m".

10-21-2010, 06:21 PM	#878
jgredline Veteran Member Join Date: Oct 2007 Location: LosAngeles, Ca. Photos: Albums Posts: 10,628	well folks I sold my lens..I must admit I am sad over it. But I will continue to follow this wonderful thread and hope to see some images from my now sold lens here.

10-26-2010, 01:38 PM	#880
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by kiaa Thank u very much,axl. Good advice. I am using MF now. BTW: I tried again. Which confused me is that when i set it to "infinity" at 10mm, the picture is fuzzy(shooting on a greater distance). When i set it to "1m", pictures became normal. And this wont happen at 20mm. The picture is sharp when i set it to "infinity" at 20mm, on the contrary, the picture is fuzzy when i set it to "1m". you are very welcome... the infinity on this lens is weird. I believe the lens can acutally focus past infinity. And the mark on that setting is rather unclear IMO...

10-26-2010, 01:39 PM	#881
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by jgredline well folks I sold my lens..I must admit I am sad over it. But I will continue to follow this wonderful thread and hope to see some images from my now sold lens here. as sad as I am to read that, I have to admit I may very soon follow the suit...

10-26-2010, 01:42 PM	#882
jgredline Veteran Member Join Date: Oct 2007 Location: LosAngeles, Ca. Photos: Albums Posts: 10,628	Originally posted by axl as sad as I am to read that, I have to admit I may very soon follow the suit... Since buying the DA15 I have not missed the Sigma one bit. I thought I would miss the 10-14 range, but have not.

10-26-2010, 01:47 PM	#883
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Originally posted by jgredline Since buying the DA15 I have not missed the Sigma one bit. I thought I would miss the 10-14 range, but have not. you are not helping here Javier! the 15mm is exactly what I'm thinking of! I got FA*24 which seems to be great but it's large(ish) and to have 10-20 + 24 + 31 as my wide end is rather large combo so I'm thinking of DA15 to replace the Sigma, because like this I'm really tempted to leave the Sigma behind every time I take 24 and vice versa.... although I have to admit that IF I would see good deal on K/A15 I'd get in in the heart beat despite the bulk....

10-26-2010, 05:48 PM	#884
JHD Veteran Member Join Date: Jan 2010 Photos: Albums Posts: 1,406	Why would someone replace the 10-20 with a DA15? Isn't that like selling a Bigma for a 200mm prime? For the record I have both the DA15 and the 10-20. And even though I prefer and shoot more often with the 10-20, I won't be selling my DA15.

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