Sigma 50-100mm F/1.8 APS-C

Nicolas06 · 02-20-2016, 03:55 AM

I can get 80% of what this lens will do with my FA77 for half of the price (well I reco the sigma would likely be at 1000$ street price pretty soon) and 1/8 the weight. I don't think the sigma will match the rendering of FA77. If sigma 18-35 is any clue for AF, I guess the FA77 would get better AF too. Let's add the FA43 and I cover 100%+ of what this guy does but with superior results from the FA ltd that are 15-20 year old !

If I deciced for sigma 18-35 + 50-100 + K3-II I'll pay 3200€ in France. I I decide for sigma 24-70 f/2.8 + tamron 70-200 f/2.8 + K1 I'll get a lighter pack, as much deph of field control... and pay 2800€.

But I agree that if I want to keep APSC and shot some wedding professionnally then I could consider this one. Of course this has 0% change of happening as I'll never make as much money as a mediocre photographer as I do as hopefully not to bad software engineer. Plus honestly I still prefer to code all day that take photo all day.

**Digitalis** · 02-20-2016, 03:59 AM

Originally posted by Nicolas06

I don't think the sigma will match the rendering of FA77.

The Sigma 18-35mm f/1.8 Art can't hold a candle to the FA31 Limited in that regard.

Edgar_in_Indy · 02-23-2016, 07:59 AM

Originally posted by Ash

Get ready for its IQ. It may just follow a number of other superfast Sigma lenses that are barely useable near wide-open.

Which lenses are those?

**Digitalis** · 02-23-2016, 08:05 AM

Originally posted by Ash

It may just follow a number of other superfast Sigma lenses that are barely useable near wide-open.

I share Edgars curiosity on this....exactly which lenses are you referring to?

bertwert · 02-23-2016, 09:07 AM

Originally posted by Digitalis

I share Edgars curiosity on this....exactly which lenses are you referring to?

Originally posted by Edgar_in_Indy

Which lenses are those?

I'd guess 35/1.4 and 18-35/1.8 maybe...?

**Digitalis** · 02-23-2016, 09:20 AM

Originally posted by bertwert

18-35/1.8 maybe

That lens is perfectly usable, I wouldn't call it superfast* but even at f/1.8 - Though @31mm the Pentax FA31 is sharper than the Sigma towards the corners at f/1.8.

Originally posted by bertwert

I'd guess 35/1.4

Again,not superfast* but still I'd say that lens is usable wide open, I own one in Nikon F mount. I daresay it is more usable than the Sigma 30mm f/1.4 EX.

*Super speed lenses are traditionally in the f/1.2~f/0.95 aperture range.

bertwert · 02-23-2016, 09:36 AM

Originally posted by Digitalis

That lens is perfectly usable, I wouldn't call it superfast* but even at f/1.8 - Though @31mm the Pentax FA31 is sharper than the Sigma towards the corners at f/1.8.

Again,not superfast* but still I'd say that lens is usable wide open, I own one in Nikon F mount. I daresay it is more usable than the Sigma 30mm f/1.4 EX.

*Super speed lenses are traditionally in the f/1.2~f/0.95 aperture range.

I don't know much on this topic I just thought of some sigma lenses I've heard of that are faster than f/2...

Edgar_in_Indy · 02-23-2016, 09:55 AM

Originally posted by bertwert

I don't know much on this topic I just thought of some sigma lenses I've heard of that are faster than f/2...

I think that Sigma still bears the stigma (lol) of their days as a no-frills, budget lens maker. But over the last decade, and especially in the few years, they've worked hard to provide lenses that are competitive with the best lenses that the camera makers offer.

I thought your comment was strange since Sigma has kind of gotten a reputation for providing big lenses that place a priority on being sharp wide open, but may make sacrifices in other, less quantifiable areas of image quality, such as rendition of out-of-focus areas.

**Digitalis** · 02-23-2016, 09:58 AM

Originally posted by Edgar_in_Indy

but may make sacrifices in other, less quantifiable areas of image quality, such as rendition of out-of-focus areas.

such as OOF highlights:

Pentax K5IIs - Sigma 18-35mm @ 23mm f/1.8 ISO 3200 1/250th

bertwert · 02-23-2016, 09:59 AM

Originally posted by Edgar_in_Indy

I thought your comment was strange

Do you mean the comment Ash made? That wasn't me...

I was just naming some fast Sigma lenses I heard of.
I've got no idea on IQ and sharpness of these Sigma lenses as I'v never used them.

Edgar_in_Indy · 02-23-2016, 10:04 AM

Originally posted by bertwert

Do you mean the comment Ash made? That wasn't me...

Yeah, sorry, I was referring to Ash's original comment. I guess you were just collateral damage.

**pres589** · 02-23-2016, 10:42 AM

Odd focal length range for APS-C, yeah? If this 50-100 Sigma was available in k-mount, would folks really run to it over the DA* 50-135 f2.8? I know, f1.8 is faster than 2.8, but I wonder how great the Sigma will really perform wide-open.

Not that I see myself ever looking for such a lens so what do I know...

Edgar_in_Indy · 02-23-2016, 11:32 AM

Originally posted by pres589

Odd focal length range for APS-C, yeah? If this 50-100 Sigma was available in k-mount, would folks really run to it over the DA* 50-135 f2.8? I know, f1.8 is faster than 2.8, but I wonder how great the Sigma will really perform wide-open.

Not that I see myself ever looking for such a lens so what do I know...

It is an unusual focal range, but that is only because of the unusually wide aperture. But for indoor performance arts, such as ballet, gymnastics, musical performances, as well as indoor sports such as basketball and swimming, this will be a useful focal length since you will generally not be too far away from the action.

I could even see myself using this lens at family get togethers and social events as a long portrait lens for candid shots.

The large f1.8 aperture would be great for separating subjects from the background, and the extra speed will really be appreciated in exposure when the indoor lighting is not ideal. It's more than a full stop faster than an f/2.8 lens. That means instead of having to shoot at ISO 6400 to get enough shutter speed, you could shoot at, say, ISO 2500. That's a pretty big deal.

The only questions at this point are image quality and AF performance. If it performs anything like my other two fast Sigma telephoto zooms (50-150mm f/2.8 and 100-300mm f4) then it will be a great lens. Which will only add insult to injury if they never offer it in K-mount!

FantasticMrFox · 02-23-2016, 04:09 PM

Originally posted by pres589

Odd focal length range for APS-C, yeah? If this 50-100 Sigma was available in k-mount, would folks really run to it over the DA* 50-135 f2.8? I know, f1.8 is faster than 2.8, but I wonder how great the Sigma will really perform wide-open.

Judging from the quality of the 'Art' line so far and despite the DA* being a good lens, the Sigma would probably beat it in all respects but weather sealing and focal length. It will probably have better IQ and it's faster, both in terms of aperture and AF.

**Bruce Clark** · 02-23-2016, 06:44 PM

I sent Sigma a complaint regarding lack of Pentax suppoort.

Response received. Note use of the term "miniscule share"

As a former Pro Photographer for Pentax USA I feel your pain but unfortunately Pentax has such a miniscule share of the market at this point it is not economically feasible to manufacture some of the more esoteric lenses for the mount. Perhaps in time Pentax can regain a more sizeable market share thus making it possible for us to dedicate the factory space required for producing lenses for the mount. Unfortunately there are no plans at the present time that I am aware of to manufacture any specific lenses in the Pentax P/KAF lens mount.
Sincerely,
Paul Pizzano
SIGMA Corporation of America l 15 Fleetwood Ct, Ronkonkoma, NY 11779

02-23-2016, 11:32 AM	#28
Edgar_in_Indy Veteran Member Join Date: May 2010 Location: Indiana, USA Photos: Gallery Posts: 2,685	Originally posted by pres589 Odd focal length range for APS-C, yeah? If this 50-100 Sigma was available in k-mount, would folks really run to it over the DA* 50-135 f2.8? I know, f1.8 is faster than 2.8, but I wonder how great the Sigma will really perform wide-open. Not that I see myself ever looking for such a lens so what do I know... It is an unusual focal range, but that is only because of the unusually wide aperture. But for indoor performance arts, such as ballet, gymnastics, musical performances, as well as indoor sports such as basketball and swimming, this will be a useful focal length since you will generally not be too far away from the action. I could even see myself using this lens at family get togethers and social events as a long portrait lens for candid shots. The large f1.8 aperture would be great for separating subjects from the background, and the extra speed will really be appreciated in exposure when the indoor lighting is not ideal. It's more than a full stop faster than an f/2.8 lens. That means instead of having to shoot at ISO 6400 to get enough shutter speed, you could shoot at, say, ISO 2500. That's a pretty big deal. The only questions at this point are image quality and AF performance. If it performs anything like my other two fast Sigma telephoto zooms (50-150mm f/2.8 and 100-300mm f4) then it will be a great lens. Which will only add insult to injury if they never offer it in K-mount! Last edited by Edgar_in_Indy; 02-23-2016 at 07:07 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
FA 43/1.9 vs. FA 31/1.8: is it about APS-C?	bsamcash	Pentax SLR Lens Discussion	18	01-15-2019 05:43 AM
For Sale - Sold: Sigma 50 -500 BIGMA + 1.4 Sigma T/C	kentster	Sold Items	15	01-07-2016 08:50 AM
For Sale - Sold: D FA 50mm f/2.8 1:1 macro, Sigma 18-50 f/2.8-4.5 OS/HSM	jimr-pdx	Sold Items	5	10-20-2015 08:28 PM
New Sigma 18-35 F1.8 APS-C	yygomez	Pentax SLR Lens Discussion	10	04-19-2013 04:11 PM
For Sale - Sold: Pentax-F 100mm f/2.8, Pentax-F 50mm f/1.7, Sigma 105mm f/2.8, and Sigma 24-60mm F/2.8	hiep2503	Sold Items	7	12-21-2012 09:13 AM

02-20-2016, 03:55 AM	#16
Nicolas06 Veteran Member Join Date: Nov 2013 Posts: 4,854	I can get 80% of what this lens will do with my FA77 for half of the price (well I reco the sigma would likely be at 1000$ street price pretty soon) and 1/8 the weight. I don't think the sigma will match the rendering of FA77. If sigma 18-35 is any clue for AF, I guess the FA77 would get better AF too. Let's add the FA43 and I cover 100%+ of what this guy does but with superior results from the FA ltd that are 15-20 year old ! If I deciced for sigma 18-35 + 50-100 + K3-II I'll pay 3200€ in France. I I decide for sigma 24-70 f/2.8 + tamron 70-200 f/2.8 + K1 I'll get a lighter pack, as much deph of field control... and pay 2800€. But I agree that if I want to keep APSC and shot some wedding professionnally then I could consider this one. Of course this has 0% change of happening as I'll never make as much money as a mediocre photographer as I do as hopefully not to bad software engineer. Plus honestly I still prefer to code all day that take photo all day.

02-20-2016, 03:59 AM	#17
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by Nicolas06 I don't think the sigma will match the rendering of FA77. The Sigma 18-35mm f/1.8 Art can't hold a candle to the FA31 Limited in that regard.

02-23-2016, 07:59 AM	#18
Edgar_in_Indy Veteran Member Join Date: May 2010 Location: Indiana, USA Photos: Gallery Posts: 2,685	Originally posted by Ash Get ready for its IQ. It may just follow a number of other superfast Sigma lenses that are barely useable near wide-open. Which lenses are those?

02-23-2016, 08:05 AM	#19
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by Ash It may just follow a number of other superfast Sigma lenses that are barely useable near wide-open. I share Edgars curiosity on this....exactly which lenses are you referring to?

02-23-2016, 09:07 AM	#20
bertwert Veteran Member Join Date: Jun 2015 Location: Golden, BC Posts: 15,173	Originally posted by Digitalis I share Edgars curiosity on this....exactly which lenses are you referring to? Originally posted by Edgar_in_Indy Which lenses are those? I'd guess 35/1.4 and 18-35/1.8 maybe...?

02-23-2016, 09:20 AM	#21
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by bertwert 18-35/1.8 maybe That lens is perfectly usable, I wouldn't call it superfast* but even at f/1.8 - Though @31mm the Pentax FA31 is sharper than the Sigma towards the corners at f/1.8. Originally posted by bertwert I'd guess 35/1.4 Again,not superfast* but still I'd say that lens is usable wide open, I own one in Nikon F mount. I daresay it is more usable than the Sigma 30mm f/1.4 EX. *Super speed lenses are traditionally in the f/1.2~f/0.95 aperture range.

02-23-2016, 09:36 AM	#22
bertwert Veteran Member Join Date: Jun 2015 Location: Golden, BC Posts: 15,173	Originally posted by Digitalis That lens is perfectly usable, I wouldn't call it superfast* but even at f/1.8 - Though @31mm the Pentax FA31 is sharper than the Sigma towards the corners at f/1.8. Again,not superfast* but still I'd say that lens is usable wide open, I own one in Nikon F mount. I daresay it is more usable than the Sigma 30mm f/1.4 EX. *Super speed lenses are traditionally in the f/1.2~f/0.95 aperture range. I don't know much on this topic I just thought of some sigma lenses I've heard of that are faster than f/2...

02-23-2016, 09:55 AM	#23
Edgar_in_Indy Veteran Member Join Date: May 2010 Location: Indiana, USA Photos: Gallery Posts: 2,685	Originally posted by bertwert I don't know much on this topic I just thought of some sigma lenses I've heard of that are faster than f/2... I think that Sigma still bears the stigma (lol) of their days as a no-frills, budget lens maker. But over the last decade, and especially in the few years, they've worked hard to provide lenses that are competitive with the best lenses that the camera makers offer. I thought your comment was strange since Sigma has kind of gotten a reputation for providing big lenses that place a priority on being sharp wide open, but may make sacrifices in other, less quantifiable areas of image quality, such as rendition of out-of-focus areas.

02-23-2016, 09:58 AM	#24
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by Edgar_in_Indy but may make sacrifices in other, less quantifiable areas of image quality, such as rendition of out-of-focus areas. such as OOF highlights: Pentax K5IIs - Sigma 18-35mm @ 23mm f/1.8 ISO 3200 1/250th

02-23-2016, 09:59 AM	#25
bertwert Veteran Member Join Date: Jun 2015 Location: Golden, BC Posts: 15,173	Originally posted by Edgar_in_Indy I thought your comment was strange Do you mean the comment Ash made? That wasn't me... I was just naming some fast Sigma lenses I heard of. I've got no idea on IQ and sharpness of these Sigma lenses as I'v never used them.

02-23-2016, 10:04 AM	#26
Edgar_in_Indy Veteran Member Join Date: May 2010 Location: Indiana, USA Photos: Gallery Posts: 2,685	Originally posted by bertwert Do you mean the comment Ash made? That wasn't me... Yeah, sorry, I was referring to Ash's original comment. I guess you were just collateral damage.

02-23-2016, 10:42 AM	#27
pres589 Site Supporter Join Date: Jan 2014 Location: Wichita, KS Photos: Albums Posts: 4,529	Odd focal length range for APS-C, yeah? If this 50-100 Sigma was available in k-mount, would folks really run to it over the DA* 50-135 f2.8? I know, f1.8 is faster than 2.8, but I wonder how great the Sigma will really perform wide-open. Not that I see myself ever looking for such a lens so what do I know...

02-23-2016, 04:09 PM	#29
FantasticMrFox Veteran Member Join Date: Oct 2014 Location: Munich Posts: 2,339	Originally posted by pres589 Odd focal length range for APS-C, yeah? If this 50-100 Sigma was available in k-mount, would folks really run to it over the DA* 50-135 f2.8? I know, f1.8 is faster than 2.8, but I wonder how great the Sigma will really perform wide-open. Judging from the quality of the 'Art' line so far and despite the DA* being a good lens, the Sigma would probably beat it in all respects but weather sealing and focal length. It will probably have better IQ and it's faster, both in terms of aperture and AF.

02-23-2016, 06:44 PM	#30
Bruce Clark Loyal Site Supporter Join Date: Mar 2010 Location: Ocean Grove, Victoria Photos: Gallery \| Albums Posts: 4,458	I sent Sigma a complaint regarding lack of Pentax suppoort. Response received. Note use of the term "miniscule share" As a former Pro Photographer for Pentax USA I feel your pain but unfortunately Pentax has such a miniscule share of the market at this point it is not economically feasible to manufacture some of the more esoteric lenses for the mount. Perhaps in time Pentax can regain a more sizeable market share thus making it possible for us to dedicate the factory space required for producing lenses for the mount. Unfortunately there are no plans at the present time that I am aware of to manufacture any specific lenses in the Pentax P/KAF lens mount. Sincerely, Paul Pizzano SIGMA Corporation of America l 15 Fleetwood Ct, Ronkonkoma, NY 11779