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Stavri · 03-23-2017, 10:58 PM

Between focus calibrations last night i decided to test two macros on the K1, Sigma 70 macro vs Pentax D-Fa 50 macro....Which one comes on top?

shooting settings:
Lens X:
f2.8 1/5s: f3.5 1/0.3s: f4.0 1/0.4s: f5.6 1/0.8s

Lens Y:
f2.8 1/5s: f3.5 1/0.4s: f4.0 1/0.4s: f5.6 1/0.8s

Y lens @ F2.8 1/5s

X lens @ f2.8 1/5s

Y @ f3.5 1/0.3s

X @ f3.5 1/0.3s

Y @ f4.0 1/0.4s

X @ f4.0 1/0.4s

Y @ 5.6 1/0.8.s

X @ 5.6 1/0.8s

Last edited by Stavri; 03-24-2017 at 05:44 AM.

Medex · 03-23-2017, 11:37 PM

Pentax first set

pakinjapan · 03-23-2017, 11:50 PM

set Y = Pentax

RAART · 03-24-2017, 01:31 AM

Sigma = Y

**BigMackCam** · 03-24-2017, 02:25 AM

I like the Y lens best, but a large part of that is the contrast. Both look good, but Y has real bite to it, even wide open. I'm going with Y = Pentax

Interesting (though not entirely surprising) that the metering has produced different exposure results, with X consistently over-exposing compared to Y (or Y under-exposing compared to X, depending on how you look at it

).

D1N0 · 03-24-2017, 03:05 AM

X is a bit underexposed it seems, but more contrast. Also the OOF blur is much wider spread in X than in Y so I guess X is the 70mm Sigma which also has a bit of purple fringing that seems typical of sigma.

LensBeginner · 03-24-2017, 03:31 AM

WARNING: X-lens at f/2.8 actually links to the f/5.6 picture.
On Flickr, the Y lens is much more contrasted WO, but also has more PF (see notch in the top of the paper).

Stavri · 03-24-2017, 05:11 AM

Originally posted by LensBeginner

WARNING: X-lens at f/2.8 actually links to the f/5.6 picture.
On Flickr, the Y lens is much more contrasted WO, but also has more PF (see notch in the top of the paper).

fixed it...

ZombieArmy · 03-24-2017, 05:21 AM

Both seem stunning in terms of sharpness, but the Y obviously has more contrast. I'll go Y = Pentax just cuz.

Na Horuk · 03-24-2017, 05:39 AM - **1 Like**

Y appears to be slightly more contrasty and telephoto, which makes it look more crisp and sharper. So I assume it is the Sigma.
I've read very few negative reviews of the DFA 50mm, but I have read immense praise over the Sigma 70mm, so the Sigma is probably a hair better than the Pentax. That said, both look super sharp and I would be quite satisfied with either. Once you add PP to those photos they are both more than sharp enough

Stavri · 03-24-2017, 05:41 AM

Originally posted by BigMackCam

I like the Y lens best, but a large part of that is the contrast. Both look good, but Y has real bite to it, even wide open. I'm going with Y = Pentax

Interesting (though not entirely surprising) that the metering has produced different exposure results, with X consistently over-exposing compared to Y (or Y under-exposing compared to X, depending on how you look at it

).

the settings were kept the same throughout the shoot

Lens X:
f2.8 1/5s: f3.5 1/0.3s: f4.0 1/0.4s: f5.6 1/0.8s

Lens Y:
f2.8 1/5s: f3.5 1/0.3s: f4.0 1/0.4s: f5.6 1/0.8s

---------- Post added 03-24-17 at 05:51 AM ----------

Originally posted by pakinjapan

set Y = Pentax

Originally posted by RAART

Sigma = Y

make up your minds guys..........

**FozzFoster** · 03-24-2017, 06:01 AM

The y has a narrower field of view than the x. Suggesting that the y is the sigma 70mm and the x is the Pentax 50mm.

Stavri · 03-24-2017, 06:04 AM

Originally posted by FozzFoster

The y has a narrower field of view than the x. Suggesting that the y is the sigma 70mm and the x is the Pentax 50mm.

I would disregard that in my analysis...

pakinjapan · 03-24-2017, 06:24 AM

Originally posted by Stavri

make up your minds guys..........

already did

set Y looks very familiar to me. The color, the contrast, the out of focus area, the tin purple flare at the top edge of the white paper, and I only have Pentax lenses.

Pixelhdr · 03-24-2017, 08:53 AM

I don't have the Pentax but love the Sigma 70. My totally baseless guess is Y=Sigma.

03-23-2017, 10:58 PM	#1
Stavri Veteran Member Join Date: Aug 2014 Location: at a Bean & Leaf Photos: Albums Posts: 1,832	Blind Test (Pentax D-Fa 50mm f2.8 vs Sigma Ex Dg 70mm F2.8 Macro) Between focus calibrations last night i decided to test two macros on the K1, Sigma 70 macro vs Pentax D-Fa 50 macro....Which one comes on top? shooting settings: Lens X: f2.8 1/5s: f3.5 1/0.3s: f4.0 1/0.4s: f5.6 1/0.8s Lens Y: f2.8 1/5s: f3.5 1/0.4s: f4.0 1/0.4s: f5.6 1/0.8s Y lens @ F2.8 1/5s X lens @ f2.8 1/5s Y @ f3.5 1/0.3s X @ f3.5 1/0.3s Y @ f4.0 1/0.4s X @ f4.0 1/0.4s Y @ 5.6 1/0.8.s X @ 5.6 1/0.8s Last edited by Stavri; 03-24-2017 at 05:44 AM.

03-24-2017, 05:41 AM	#11
Stavri Veteran Member Join Date: Aug 2014 Location: at a Bean & Leaf Photos: Albums Posts: 1,832 Original Poster	Originally posted by BigMackCam I like the Y lens best, but a large part of that is the contrast. Both look good, but Y has real bite to it, even wide open. I'm going with Y = Pentax Interesting (though not entirely surprising) that the metering has produced different exposure results, with X consistently over-exposing compared to Y (or Y under-exposing compared to X, depending on how you look at it ). the settings were kept the same throughout the shoot Lens X: f2.8 1/5s: f3.5 1/0.3s: f4.0 1/0.4s: f5.6 1/0.8s Lens Y: f2.8 1/5s: f3.5 1/0.3s: f4.0 1/0.4s: f5.6 1/0.8s ---------- Post added 03-24-17 at 05:51 AM ---------- Originally posted by pakinjapan set Y = Pentax Originally posted by RAART Sigma = Y make up your minds guys.......... Last edited by Stavri; 03-24-2017 at 05:52 AM.

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03-24-2017, 02:25 AM	#5
BigMackCam Digitiser of Film Join Date: Mar 2010 Location: North East of England Posts: 20,702	I like the Y lens best, but a large part of that is the contrast. Both look good, but Y has real bite to it, even wide open. I'm going with Y = Pentax Interesting (though not entirely surprising) that the metering has produced different exposure results, with X consistently over-exposing compared to Y (or Y under-exposing compared to X, depending on how you look at it ).

03-24-2017, 03:05 AM	#6
D1N0 Pentaxian Join Date: May 2012 Location: --- Photos: Gallery Posts: 6,802	X is a bit underexposed it seems, but more contrast. Also the OOF blur is much wider spread in X than in Y so I guess X is the 70mm Sigma which also has a bit of purple fringing that seems typical of sigma.

03-24-2017, 03:31 AM	#7
LensBeginner Veteran Member Join Date: Sep 2014 Photos: Albums Posts: 4,696	WARNING: X-lens at f/2.8 actually links to the f/5.6 picture. On Flickr, the Y lens is much more contrasted WO, but also has more PF (see notch in the top of the paper).

03-24-2017, 05:11 AM	#8
Stavri Veteran Member Join Date: Aug 2014 Location: at a Bean & Leaf Photos: Albums Posts: 1,832 Original Poster	Originally posted by LensBeginner WARNING: X-lens at f/2.8 actually links to the f/5.6 picture. On Flickr, the Y lens is much more contrasted WO, but also has more PF (see notch in the top of the paper). fixed it...

03-24-2017, 05:21 AM	#9
ZombieArmy Pentaxian Join Date: Jun 2014 Location: Florida Posts: 3,210	Both seem stunning in terms of sharpness, but the Y obviously has more contrast. I'll go Y = Pentax just cuz.

03-24-2017, 05:39 AM - 1 Like	#10
Na Horuk Veteran Member Join Date: Feb 2012 Location: Slovenia, probably Photos: Gallery \| Albums Posts: 11,186	Y appears to be slightly more contrasty and telephoto, which makes it look more crisp and sharper. So I assume it is the Sigma. I've read very few negative reviews of the DFA 50mm, but I have read immense praise over the Sigma 70mm, so the Sigma is probably a hair better than the Pentax. That said, both look super sharp and I would be quite satisfied with either. Once you add PP to those photos they are both more than sharp enough

03-24-2017, 06:01 AM	#12
FozzFoster Custom User Title Join Date: Jan 2016 Location: Alberta Photos: Albums Posts: 6,808	The y has a narrower field of view than the x. Suggesting that the y is the sigma 70mm and the x is the Pentax 50mm.

03-24-2017, 06:04 AM	#13
Stavri Veteran Member Join Date: Aug 2014 Location: at a Bean & Leaf Photos: Albums Posts: 1,832 Original Poster	Originally posted by FozzFoster The y has a narrower field of view than the x. Suggesting that the y is the sigma 70mm and the x is the Pentax 50mm. I would disregard that in my analysis...

03-24-2017, 06:24 AM	#14
pakinjapan Veteran Member Join Date: Jun 2012 Location: Tokyo Photos: Gallery Posts: 1,041	Originally posted by Stavri make up your minds guys.......... already did set Y looks very familiar to me. The color, the contrast, the out of focus area, the tin purple flare at the top edge of the white paper, and I only have Pentax lenses.

03-24-2017, 08:53 AM	#15
Pixelhdr Forum Member Join Date: Feb 2014 Posts: 90	I don't have the Pentax but love the Sigma 70. My totally baseless guess is Y=Sigma.

Blind Test (Pentax D-Fa 50mm f2.8 vs Sigma Ex Dg 70mm F2.8 Macro)

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