Guess the lens?

DanielT74 · 05-26-2011, 11:21 PM

30/2.8 is very sharp. So I would second, sorry third, this.

**Douglas_of_Sweden** · 05-27-2011, 12:47 AM

Well, it is the only f2.8 Pentax K mount lens in this rough (28-35mm) focal range that can be described as difficult to find. M40/2.8 are everywhere.

hoanpham · 05-27-2011, 02:22 AM

Yes it's K30. All winners ;-)

i am impressed by this lens. tack sharp f2.8, razor sharp f4... still run tests for it... lucky me ;-)

who's next?

DanielT74 · 05-27-2011, 03:09 AM

OK, here's one from me. This is going to be a tricky one, but I will give clues once the focal length is guessed (close enough):

PS Just unpacked this lens and shot the mug standing at the edge of my desk at work (sorry maybe more interesting pics tomorrow!)

axl · 05-27-2011, 03:29 AM

DA21/3.2?
Seems fairly wide with touch of barrel distortion and fairly deep DOF

DanielT74 · 05-27-2011, 03:39 AM

OK, very close to the FL, axl! Impressive.

Here's another pic I managed to sneak in (as well as a grudging consent to posting it here):

RXrenesis8 · 05-27-2011, 04:15 AM

Judging by the distortion on the wide end I'd have to say that that's the DA* 16-50

DanielT74 · 05-27-2011, 05:26 AM

Here I am trying to shoot a similar pic with the DA*16-50 at home (at night). One thing I notice is the shallower depth of field on the "mystery" lens.

In other words, no it's not the 16-50. Especially the portrait, my 16-50 portraits didn't look like this.

axl · 05-27-2011, 05:34 AM

I'd say it's between 20-24mm if it's prime. And f stop around f4 or there abouts. Correct?

DanielT74 · 05-27-2011, 05:36 AM

FL is close, aperture is faster.

crop from the portrait:

Hint: It is not a Pentax lens (just thought it might be interesting for folks to see what these lenses do) but adapted to Pentax.

PS The earlier comment was misleading - sorry. Meant to be "just took it out of the box, adapted it and shot the mug on my desk."

Pentaxor · 05-27-2011, 06:41 AM

an old 20mm ?

RXrenesis8 · 05-27-2011, 07:06 AM

My final guess for this lens (and then I'll leave it to others): Sigma 20mm f1.8

aah, I just saw that he had to adapt it to K mount. so probably an M42 or an adaptall, either way that brings this contest beyond the scope of my knowledge.

axl · 05-27-2011, 08:10 AM

Is it MF or AF?
---
Disregard that silly question. If it's adapted, it must be MF.
Now a lot depends on how dificult the adapting was. If it was dificult one including mount swap, we might talk Zeiss or Leica here. If it's medium one involving dremel and some shaving then it might even be Nikkor, if it's M42... Oh well, many possibilities, but I'd guess either Zeiss 18/3.5 or Mir 20/3.5

**Douglas_of_Sweden** · 05-27-2011, 10:49 AM

Originally posted by RXrenesis8

My final guess for this lens (and then I'll leave it to others): Sigma 20mm f1.8

aah, I just saw that he had to adapt it to K mount. so probably an M42 or an adaptall, either way that brings this contest beyond the scope of my knowledge.

This is more distorsion than my Sigma 20/1.8 I dare say.

Elmarit 19/2.8, Leitax conversion.

**Douglas_of_Sweden** · 05-27-2011, 10:58 AM

Originally posted by DanielT74

OK, here's one from me. This is going to be a tricky one, but I will give clues once the focal length is guessed (close enough):

PS Just unpacked this lens and shot the mug standing at the edge of my desk at work (sorry maybe more interesting pics tomorrow!)

Originally posted by DanielT74

Here I am trying to shoot a similar pic with the DA*16-50 at home (at night). One thing I notice is the shallower depth of field on the "mystery" lens.

In other words, no it's not the 16-50. Especially the portrait, my 16-50 portraits didn't look like this.

I realise we have started a whole new theme here. If you like to I can rename the thread "guess the mug club"?

Here is next lens, sorry mug...

Edit: This was a joke, OK? Don't start guessing on this one.

05-27-2011, 05:36 AM	#370
DanielT74 Veteran Member Join Date: Nov 2008 Location: Australia Photos: Albums Posts: 1,377	FL is close, aperture is faster. crop from the portrait: Hint: It is not a Pentax lens (just thought it might be interesting for folks to see what these lenses do) but adapted to Pentax. PS The earlier comment was misleading - sorry. Meant to be "just took it out of the box, adapted it and shot the mug on my desk." Last edited by DanielT74; 05-27-2011 at 05:41 AM.

05-27-2011, 07:06 AM	#372
RXrenesis8 Veteran Member Join Date: Jan 2011 Location: Orlando, FL (USA) Photos: Gallery \| Albums Posts: 523	My final guess for this lens (and then I'll leave it to others): Sigma 20mm f1.8 aah, I just saw that he had to adapt it to K mount. so probably an M42 or an adaptall, either way that brings this contest beyond the scope of my knowledge. Last edited by RXrenesis8; 05-27-2011 at 10:17 AM.

05-27-2011, 08:10 AM	#373
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	Is it MF or AF? --- Disregard that silly question. If it's adapted, it must be MF. Now a lot depends on how dificult the adapting was. If it was dificult one including mount swap, we might talk Zeiss or Leica here. If it's medium one involving dremel and some shaving then it might even be Nikkor, if it's M42... Oh well, many possibilities, but I'd guess either Zeiss 18/3.5 or Mir 20/3.5 Last edited by axl; 05-27-2011 at 09:04 AM.

05-27-2011, 10:58 AM	#375
Douglas_of_Sweden Site Supporter Join Date: Apr 2008 Location: Stockholm Photos: Gallery Posts: 3,374	Originally posted by DanielT74 OK, here's one from me. This is going to be a tricky one, but I will give clues once the focal length is guessed (close enough): PS Just unpacked this lens and shot the mug standing at the edge of my desk at work (sorry maybe more interesting pics tomorrow!) Originally posted by DanielT74 Here I am trying to shoot a similar pic with the DA16-50 at home (at night). One thing I notice is the shallower depth of field on the "mystery" lens. In other words, no it's not the 16-50. Especially the portrait, my 16-50 portraits didn't look like this. I realise we have started a whole new theme here. If you like to I can rename the thread "guess the mug club"? Here is next lens, sorry mug... Edit: This was a joke, OK? Don't start guessing on this one. Last edited by Douglas_of_Sweden; 05-27-2011 at 03:23 PM.*

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05-26-2011, 11:21 PM	#361
DanielT74 Veteran Member Join Date: Nov 2008 Location: Australia Photos: Albums Posts: 1,377	30/2.8 is very sharp. So I would second, sorry third, this.

05-27-2011, 12:47 AM	#362
Douglas_of_Sweden Site Supporter Join Date: Apr 2008 Location: Stockholm Photos: Gallery Posts: 3,374	Well, it is the only f2.8 Pentax K mount lens in this rough (28-35mm) focal range that can be described as difficult to find. M40/2.8 are everywhere.

05-27-2011, 02:22 AM	#363
hoanpham Veteran Member Join Date: Nov 2009 Location: Strand Photos: Gallery \| Albums Posts: 1,366	Yes it's K30. All winners ;-) i am impressed by this lens. tack sharp f2.8, razor sharp f4... still run tests for it... lucky me ;-) who's next?

05-27-2011, 03:09 AM	#364
DanielT74 Veteran Member Join Date: Nov 2008 Location: Australia Photos: Albums Posts: 1,377	OK, here's one from me. This is going to be a tricky one, but I will give clues once the focal length is guessed (close enough): PS Just unpacked this lens and shot the mug standing at the edge of my desk at work (sorry maybe more interesting pics tomorrow!)

05-27-2011, 03:29 AM	#365
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	DA21/3.2? Seems fairly wide with touch of barrel distortion and fairly deep DOF

05-27-2011, 03:39 AM	#366
DanielT74 Veteran Member Join Date: Nov 2008 Location: Australia Photos: Albums Posts: 1,377	OK, very close to the FL, axl! Impressive. Here's another pic I managed to sneak in (as well as a grudging consent to posting it here):

05-27-2011, 04:15 AM	#367
RXrenesis8 Veteran Member Join Date: Jan 2011 Location: Orlando, FL (USA) Photos: Gallery \| Albums Posts: 523	Judging by the distortion on the wide end I'd have to say that that's the DA* 16-50

05-27-2011, 05:26 AM	#368
DanielT74 Veteran Member Join Date: Nov 2008 Location: Australia Photos: Albums Posts: 1,377	Here I am trying to shoot a similar pic with the DA*16-50 at home (at night). One thing I notice is the shallower depth of field on the "mystery" lens. In other words, no it's not the 16-50. Especially the portrait, my 16-50 portraits didn't look like this.

05-27-2011, 05:34 AM	#369
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	I'd say it's between 20-24mm if it's prime. And f stop around f4 or there abouts. Correct?

05-27-2011, 06:41 AM	#371
Pentaxor Veteran Member Join Date: May 2009 Location: Vancouver, B.C. Photos: Gallery Posts: 6,513	an old 20mm ?

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05-27-2011, 10:49 AM	#374
Douglas_of_Sweden Site Supporter Join Date: Apr 2008 Location: Stockholm Photos: Gallery Posts: 3,374	Originally posted by RXrenesis8 My final guess for this lens (and then I'll leave it to others): Sigma 20mm f1.8 aah, I just saw that he had to adapt it to K mount. so probably an M42 or an adaptall, either way that brings this contest beyond the scope of my knowledge. This is more distorsion than my Sigma 20/1.8 I dare say. Elmarit 19/2.8, Leitax conversion.