DFA*50 1.4 coming

cesarfishman · 02-21-2017, 06:33 PM

Originally posted by davidreilly3207

Do you need true full frame?

I bought the 55 and the vignetting on FF is bad. Unusable in infinity focus between 1.4 - 3.5.

Last edited by MarkJerling; 02-21-2017 at 07:37 PM. Reason: Edited obscenity.

**monochrome** · 02-21-2017, 06:35 PM

Originally posted by normhead

Then we could all joint the "1.2 only" club. They'd hate that. They think they are special.

I think they are paying Pentax not to make a 1.2.

The best special club members are the guys who shoot an A50/1.2 at f/5.6 and claim it is a better image.

Not a Number · 02-21-2017, 06:35 PM

Originally posted by MrNPhoto

Hmm, the filename of the image is "dfa_50mm_f14_mockup_image.png"
Hope it's not another 18 months before this hits the street. (looking at the DFA 70-200)

Read it and weep

Reference of Products

Interchangeable lens for PENTAX K mount digital cameras
Model name: D FA★50mmF1.4(tentative)

Product information:
・An image circle accommodating the image size of 35mm full-frame digital cameras
・High-performance Star (★)-series lens with high-resolution , high-contrast images and beautiful bokeh (defocus) effect
・Price: Not decided
・Market launch: Not decided

Notes:
Model name, design, specification are all tentative and subject to change without notice. Price and marketing launch date will be announced at later date.

**grahame** · 02-21-2017, 06:36 PM - **6 Likes**

Originally posted by Adam

Sigma killer, finally!

Sigma copy in fact: huge, heavy. not pentax any more

normhead · 02-21-2017, 06:37 PM

Originally posted by cesarfishman

I bought the 55 and the vignetting on FF is bad. Unusable in infinity focus between 1.4 - 3.5.

Good to know.....
I retracted part about the 55.... but retain the parts about the 85, 135 and 150.

But.. if memory serves me well, my DFA 28-105 and many other FF lenses vignette on occasion. Is there a law that says no FF lenses ever vignette? That would be funny because my 18-135 vignettes on APS-c. The law would apply to FF buy not APS-c.

Just out of curiosity, at what point does the vignetting disappear?

I'm also wondering how likely it is for this lens to be used at infinity.?
blan01 posted the following images.....
https://www.pentaxforums.com/lensreviews/SMC-Pentax-DA-Star-55mm-F1.4-SDM-Lens.html

the vignetting looks fine...

They aren't shot at infinity, true, but how many 55 images are?

And is it just me or is the DA*55 not listed in the Image Database... like how weird is that?

cesarfishman · 02-21-2017, 06:38 PM

Originally posted by normhead

Good to know.....
I retracted part about the 55.... but retains he parts about the 85, 135 and 150.

Just out of curiosity, at what point does the vignetting disappear?

Don't remember exactly, but I bought the lens on Amazon and returned it after a day.

I saw that people on the forum were saying it was good to go on FF but nothing could be further from the truth... unless you want all your pictures to look like old-timey saloon portraits.

Winder · 02-21-2017, 06:43 PM - **3 Likes**

Awesome. Now where is the matching 35mm F/1.4 and the 85mm F/1.4? I want a 24mm F/1.4 first.

**grahame** · 02-21-2017, 06:44 PM - **1 Like**

Originally posted by cesarfishman

Unusable in infinity focus between 1.4

I always wonder why do we need to shoot infinity focus AND wide open f 1.4? Stars in night sky? 50mm is too long for that.

Most 1.4 lenses, from film area so we should call them FF lens, vignettes a lot if focus to infinity and wide open. they are not designed for that.

If a lens is sharp enough at 1.4-1.8 within 15 feet, I am fine if it needs stopping down when focus to infinity.

cesarfishman · 02-21-2017, 06:46 PM

Originally posted by grahame

I always wonder why do we need to shoot infinity focus AND wide open f 1.4? Stars in night sky? 50mm is too long for that.

Most 1.4 lenses, from film area so we should call them FF lens, vignettes a lot if focus to infinity and wide open. they are not designed for that.

If a lens is sharp enough at 1.4-1.8 within 15 feet, I am fine if it needs stopping down when focus to infinity.

Might be the case, but that is just the most extreme example. Vignetting was substantial stopped down as well.

Everyone's got different requirements – for me, it was just too much to be acceptable.

Also the DA*55 isn't a film lens, I don't think.

rrstuff · 02-21-2017, 06:54 PM

Originally posted by normhead

What type of drive mechanism (DC, Pulse, SDM) isn' t mentioned.

At this size? Warp drive.

---------- Post added 02-21-17 at 07:56 PM ----------

Originally posted by Adam

Sigma killer, finally!

Could that be a sigma rebrand? I know sigma sells the 50 in k-mount, but the size seems suspiciously similar.

starjedi · 02-21-2017, 06:57 PM

Originally posted by Adam

Sigma killer, finally!

Agree. I do not remember when was the last Pentax ★prime issued. 7 years? 8 years? It looks huge so that it apparently uses a large image circle (like Ottus 55 1.4 which almost covers 645 MF format) to make it sharp from center to corner...

**boriscleto** · 02-21-2017, 06:57 PM

Originally posted by monochrome

The best special club members are the guys who shoot an A50/1.2 at f/5.6 and claim it is a better image.

But they want something more than a sliver in focus...

**grahame** · 02-21-2017, 06:57 PM - **1 Like**

Originally posted by cesarfishman

Also the DA*55 isn't a film lens, I don't think.

DA55 is not a film lens. it is not even officially an FF lens.
What I said was, even film lenses perform similarly, so it is expected, because designer did not carry such requirement when making the lenses.

We care about the numbers from test chart too much these days. It forces lens maker building monsters like sony, sigma...

normhead · 02-21-2017, 07:05 PM

Originally posted by cesarfishman

Don't remember exactly, but I bought the lens on Amazon and returned it after a day.

I saw that people on the forum were saying it was good to go on FF but nothing could be further from the truth... unless you want all your pictures to look like old-timey saloon portraits.

How do you know you got a good copy?

cesarfishman · 02-21-2017, 07:05 PM

Originally posted by normhead

Good to know.....
I retracted part about the 55.... but retain the parts about the 85, 135 and 150.

But.. if memory serves me well, my DFA 28-105 and many other FF lenses vignette on occasion. Is there a law that says no FF lenses ever vignette? That would be funny because my 18-135 vignettes on APS-c. The law would apply to FF buy not APS-c.

Just out of curiosity, at what point does the vignetting disappear?

I'm also wondering how likely it is for this lens to be used at infinity.?
blan01 posted the following images.....
SMC Pentax-DA* 55mm F1.4 SDM Reviews - DA Prime Lenses - Pentax Lens Reviews & Lens Database

the vignetting looks fine...

They aren't shot at infinity, true, but how many 55 images are?

And is it just me or is the DA*55 not listed in the Image Database... like how weird is that?

These were the exact pictures I looked at before I bought the lens. When I tried it on my K1 the results were not the same. Was very unhappy.

But I'm totally okay with others finding it useful. Not looking to start a fight – just wasn't for me.

02-21-2017, 06:37 PM	#20
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,450	Originally posted by cesarfishman I bought the 55 and the vignetting on FF is bad. Unusable in infinity focus between 1.4 - 3.5. Good to know..... I retracted part about the 55.... but retain the parts about the 85, 135 and 150. But.. if memory serves me well, my DFA 28-105 and many other FF lenses vignette on occasion. Is there a law that says no FF lenses ever vignette? That would be funny because my 18-135 vignettes on APS-c. The law would apply to FF buy not APS-c. Just out of curiosity, at what point does the vignetting disappear? I'm also wondering how likely it is for this lens to be used at infinity.? blan01 posted the following images..... https://www.pentaxforums.com/lensreviews/SMC-Pentax-DA-Star-55mm-F1.4-SDM-Lens.html the vignetting looks fine... They aren't shot at infinity, true, but how many 55 images are? And is it just me or is the DA55 not listed in the Image Database... like how weird is that? Last edited by MarkJerling; 02-21-2017 at 07:44 PM. Reason: Obscenity removed in quote.*

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02-21-2017, 06:33 PM	#16
cesarfishman Forum Member Join Date: Apr 2016 Location: LA Posts: 79	Originally posted by davidreilly3207 Do you need true full frame? I bought the 55 and the vignetting on FF is bad. Unusable in infinity focus between 1.4 - 3.5. Last edited by MarkJerling; 02-21-2017 at 07:37 PM. Reason: Edited obscenity.

02-21-2017, 06:35 PM	#17
monochrome Loyal Site Supporter Join Date: Mar 2008 Location: Working From Home Photos: Gallery \| Albums Posts: 26,276	Originally posted by normhead Then we could all joint the "1.2 only" club. They'd hate that. They think they are special. I think they are paying Pentax not to make a 1.2. The best special club members are the guys who shoot an A50/1.2 at f/5.6 and claim it is a better image.

02-21-2017, 06:35 PM	#18
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,525	Originally posted by MrNPhoto Hmm, the filename of the image is "dfa_50mm_f14_mockup_image.png" Hope it's not another 18 months before this hits the street. (looking at the DFA 70-200) Read it and weep Reference of Products Interchangeable lens for PENTAX K mount digital cameras Model name: D FA★50mmF1.4(tentative) Product information: ・An image circle accommodating the image size of 35mm full-frame digital cameras ・High-performance Star (★)-series lens with high-resolution , high-contrast images and beautiful bokeh (defocus) effect ・Price: Not decided ・Market launch: Not decided Notes: Model name, design, specification are all tentative and subject to change without notice. Price and marketing launch date will be announced at later date.

02-21-2017, 06:36 PM - 6 Likes	#19
grahame Loyal Site Supporter Join Date: Aug 2011 Photos: Albums Posts: 2,041	Originally posted by Adam Sigma killer, finally! Sigma copy in fact: huge, heavy. not pentax any more

02-21-2017, 06:38 PM	#21
cesarfishman Forum Member Join Date: Apr 2016 Location: LA Posts: 79	Originally posted by normhead Good to know..... I retracted part about the 55.... but retains he parts about the 85, 135 and 150. Just out of curiosity, at what point does the vignetting disappear? Don't remember exactly, but I bought the lens on Amazon and returned it after a day. I saw that people on the forum were saying it was good to go on FF but nothing could be further from the truth... unless you want all your pictures to look like old-timey saloon portraits.

02-21-2017, 06:43 PM - 3 Likes	#22
Winder Veteran Member Join Date: Apr 2010 Location: Tennessee Posts: 6,617	Awesome. Now where is the matching 35mm F/1.4 and the 85mm F/1.4? I want a 24mm F/1.4 first.

02-21-2017, 06:44 PM - 1 Like	#23
grahame Loyal Site Supporter Join Date: Aug 2011 Photos: Albums Posts: 2,041	Originally posted by cesarfishman Unusable in infinity focus between 1.4 I always wonder why do we need to shoot infinity focus AND wide open f 1.4? Stars in night sky? 50mm is too long for that. Most 1.4 lenses, from film area so we should call them FF lens, vignettes a lot if focus to infinity and wide open. they are not designed for that. If a lens is sharp enough at 1.4-1.8 within 15 feet, I am fine if it needs stopping down when focus to infinity.

02-21-2017, 06:46 PM	#24
cesarfishman Forum Member Join Date: Apr 2016 Location: LA Posts: 79	Originally posted by grahame I always wonder why do we need to shoot infinity focus AND wide open f 1.4? Stars in night sky? 50mm is too long for that. Most 1.4 lenses, from film area so we should call them FF lens, vignettes a lot if focus to infinity and wide open. they are not designed for that. If a lens is sharp enough at 1.4-1.8 within 15 feet, I am fine if it needs stopping down when focus to infinity. Might be the case, but that is just the most extreme example. Vignetting was substantial stopped down as well. Everyone's got different requirements – for me, it was just too much to be acceptable. Also the DA*55 isn't a film lens, I don't think.

02-21-2017, 06:54 PM	#25
rrstuff Veteran Member Join Date: Sep 2013 Location: Pasadena, CA Photos: Albums Posts: 1,126	Originally posted by normhead What type of drive mechanism (DC, Pulse, SDM) isn' t mentioned. At this size? Warp drive. ---------- Post added 02-21-17 at 07:56 PM ---------- Originally posted by Adam Sigma killer, finally! Could that be a sigma rebrand? I know sigma sells the 50 in k-mount, but the size seems suspiciously similar.

02-21-2017, 06:57 PM	#26
starjedi Veteran Member Join Date: Dec 2013 Location: New Jersey Posts: 932	Originally posted by Adam Sigma killer, finally! Agree. I do not remember when was the last Pentax ★prime issued. 7 years? 8 years? It looks huge so that it apparently uses a large image circle (like Ottus 55 1.4 which almost covers 645 MF format) to make it sharp from center to corner...

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02-21-2017, 06:57 PM	#27
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,473	Originally posted by monochrome The best special club members are the guys who shoot an A50/1.2 at f/5.6 and claim it is a better image. But they want something more than a sliver in focus...

02-21-2017, 06:57 PM - 1 Like	#28
grahame Loyal Site Supporter Join Date: Aug 2011 Photos: Albums Posts: 2,041	Originally posted by cesarfishman Also the DA*55 isn't a film lens, I don't think. DA55 is not a film lens. it is not even officially an FF lens. What I said was, even film lenses perform similarly, so it is expected, because designer did not carry such requirement when making the lenses. We care about the numbers from test chart too much these days. It forces lens maker building monsters like sony, sigma...

02-21-2017, 07:05 PM	#29
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,450	Originally posted by cesarfishman Don't remember exactly, but I bought the lens on Amazon and returned it after a day. I saw that people on the forum were saying it was good to go on FF but nothing could be further from the truth... unless you want all your pictures to look like old-timey saloon portraits. How do you know you got a good copy?

02-21-2017, 07:05 PM	#30
cesarfishman Forum Member Join Date: Apr 2016 Location: LA Posts: 79	Originally posted by normhead Good to know..... I retracted part about the 55.... but retain the parts about the 85, 135 and 150. But.. if memory serves me well, my DFA 28-105 and many other FF lenses vignette on occasion. Is there a law that says no FF lenses ever vignette? That would be funny because my 18-135 vignettes on APS-c. The law would apply to FF buy not APS-c. Just out of curiosity, at what point does the vignetting disappear? I'm also wondering how likely it is for this lens to be used at infinity.? blan01 posted the following images..... SMC Pentax-DA* 55mm F1.4 SDM Reviews - DA Prime Lenses - Pentax Lens Reviews & Lens Database the vignetting looks fine... They aren't shot at infinity, true, but how many 55 images are? And is it just me or is the DA*55 not listed in the Image Database... like how weird is that? These were the exact pictures I looked at before I bought the lens. When I tried it on my K1 the results were not the same. Was very unhappy. But I'm totally okay with others finding it useful. Not looking to start a fight – just wasn't for me.