Anamorphic Lens for Pentax?

svnn · 06-25-2018, 05:14 AM

i need a guide about anamorphic lens. anyone.

victormeldrew · 06-25-2018, 06:08 AM

There is a guide here I found in the first result on google.

stevebrot · 06-25-2018, 08:07 AM

Welcome to the Pentax Forums!

To the best of my knowledge, there are no native anamorphic lenses to K or M42 mounts* that I am aware of, though front-mount auxiliary anamorphic converter lenses are probably available. As always Google is our friend as is the Wikipedia.

https://en.wikipedia.org/wiki/Anamorphic_format

Out of curiosity, what use are you considering for such a lens?

Steve

* Or other mounts used by Asahi/Pentax cameras current or historic

svnn · 06-26-2018, 04:01 PM

Originally posted by stevebrot

Welcome to the Pentax Forums!

To the best of my knowledge, there are no native anamorphic lenses to K or M42 mounts* that I am aware of, though front-mount auxiliary anamorphic converter lenses are probably available. As always Google is our friend as is the Wikipedia.

Anamorphic format - Wikipedia

Out of curiosity, what use are you considering for such a lens?

Steve

* Or other mounts used by Asahi/Pentax cameras current or historic

i know, but is there any pentax users tried an anamorphic lens stacked with pentax lens?
because i don't know how to buy right anamorph mount and anamorph lens for my camera

MarkJerling · 06-26-2018, 04:17 PM

Are you referring to something like this?
SLR Magic Anamorphot-50 1.33x Anamorphic Adapter SLRA50-1.33X

svnn · 06-27-2018, 12:42 PM

Originally posted by MarkJerling

Are you referring to something like this?
SLR Magic Anamorphot-50 1.33x Anamorphic Adapter SLRA50-1.33X

yeah that's what i looking for, thanks

pentasonic49 · 06-27-2018, 02:46 PM

Not a cheap lens, better results by cropping a normal lens are likely, since you have to correct the distortion afterward anyway.
It was used in the cine industry for widescreen coupled with compensating projector lenses.

MarkJerling · 06-27-2018, 02:52 PM

Originally posted by svnn

yeah that's what i looking for, thanks

I'm interested to know why? Please do share!

stevebrot · 06-28-2018, 11:28 AM

Originally posted by MarkJerling

I'm interested to know why? Please do share!

Me too...

Steve

victormeldrew · 06-29-2018, 06:03 AM

I am also interested

svnn · 06-29-2018, 11:11 PM

Originally posted by pentasonic49

Not a cheap lens, better results by cropping a normal lens are likely, since you have to correct the distortion afterward anyway.
It was used in the cine industry for widescreen coupled with compensating projector lenses.

i know right, because i'm working on cine industry

i love it because it has rich of depth of field and details, also lessnoise in low light...

if you want to know what anamorphic lens is a lens for film production international standar (CMIIW)

you guys could check this guide like victormeldew said :

Originally posted by victormeldrew

There is a guide here I found in the first result on google.

i'm still about going to buy and start making a film using an anamorph with my pentax

pentasonic49 · 06-30-2018, 06:24 AM

Sounds like very hard work, unless you have a software solution to processing the results automatically, as 1/2 an hour at 25fps would be 45000 separate images to cope with.

MarkJerling · 06-30-2018, 06:22 PM

Originally posted by svnn

i know right, because i'm working on cine industry

i love it because it has rich of depth of field and details, also lessnoise in low light...

if you want to know what anamorphic lens is a lens for film production international standar (CMIIW)

you guys could check this guide like victormeldew said :

i'm still about going to buy and start making a film using an anamorph with my pentax

I struggle to see the point of it - unless you're shooting film and viewing film. Can you explain to me what I'm missing?

stevebrot · 06-30-2018, 08:36 PM - **1 Like**

Originally posted by MarkJerling

I struggle to see the point of it - unless you're shooting film and viewing film. Can you explain to me what I'm missing?

What Mark said ^ ^ ^

The linked article points out that the original use is for taking and projecting wide screen cinema on standard width 35mm film (~18x24mm half frame in vertical orientation). It goes on to explain uses for digital capture, though don't know that all of the OP's expectations ("rich of depth of field and details, also lessnoise in low light") are reasonable. Use of an anamorphic lens on a Pentax dSLR will result in distortion of the image circle such that edge quality is compromised with no additional pixel participation. For example, since 1.78:1 is the only aspect ratio supported on Pentax dSLR and then only to 1920×1080 within the 1.5:1 ratio sensor, using an anamorphic lens may require cropping in post to remove degraded margins (less actual capture data) with either optical (projection) or digital (on-screen) correction needed to make standard output aspect. Less in ==> less out.

It might be worth doing on a more flexible video camera, but might not be worth the effort with Pentax dSLRs. Perhaps @LaurenOE will drop in. She is a working pro and might have some advice.

Steve

**Bob 256** · 06-30-2018, 08:47 PM

It probably applies to video more than it would to still photography since the image is compressed horizontally when it's stored and needs to be stretched when it's reproduced. As said, for prints, cropping would be a better solution, but when an image is projected (as with video), a reverse anamorph is used (can be the same one) to restore the widescreen rendition of the original shot using a base 16:9 frame (which is standardized). All of the resolution of the HD or UHD frame can be utilized instead of resorting to letterboxing which under utilizes all the available lines in the frame. The downside is potential lowered resolution due to imperfections in the anamorphic lens plus chromatic aberrations present in that lens, and some light falloff due to the increased spread of the image.

06-25-2018, 05:14 AM	#1
svnn New Member Join Date: Jun 2018 Posts: 10	Anamorphic Lens for Pentax? i need a guide about anamorphic lens. anyone.

06-25-2018, 08:07 AM	#3
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Welcome to the Pentax Forums! To the best of my knowledge, there are no native anamorphic lenses to K or M42 mounts* that I am aware of, though front-mount auxiliary anamorphic converter lenses are probably available. As always Google is our friend as is the Wikipedia. https://en.wikipedia.org/wiki/Anamorphic_format Out of curiosity, what use are you considering for such a lens? Steve * Or other mounts used by Asahi/Pentax cameras current or historic Last edited by stevebrot; 06-25-2018 at 08:13 AM.

06-29-2018, 11:11 PM	#11
svnn New Member Join Date: Jun 2018 Posts: 10 Original Poster	Originally posted by pentasonic49 Not a cheap lens, better results by cropping a normal lens are likely, since you have to correct the distortion afterward anyway. It was used in the cine industry for widescreen coupled with compensating projector lenses. i know right, because i'm working on cine industry i love it because it has rich of depth of field and details, also lessnoise in low light... if you want to know what anamorphic lens is a lens for film production international standar (CMIIW) you guys could check this guide like victormeldew said : Originally posted by victormeldrew There is a guide here I found in the first result on google. i'm still about going to buy and start making a film using an anamorph with my pentax Last edited by svnn; 06-29-2018 at 11:18 PM.

06-30-2018, 08:36 PM - 1 Like	#14
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by MarkJerling I struggle to see the point of it - unless you're shooting film and viewing film. Can you explain to me what I'm missing? What Mark said ^ ^ ^ The linked article points out that the original use is for taking and projecting wide screen cinema on standard width 35mm film (~18x24mm half frame in vertical orientation). It goes on to explain uses for digital capture, though don't know that all of the OP's expectations ("rich of depth of field and details, also lessnoise in low light") are reasonable. Use of an anamorphic lens on a Pentax dSLR will result in distortion of the image circle such that edge quality is compromised with no additional pixel participation. For example, since 1.78:1 is the only aspect ratio supported on Pentax dSLR and then only to 1920×1080 within the 1.5:1 ratio sensor, using an anamorphic lens may require cropping in post to remove degraded margins (less actual capture data) with either optical (projection) or digital (on-screen) correction needed to make standard output aspect. Less in ==> less out. It might be worth doing on a more flexible video camera, but might not be worth the effort with Pentax dSLRs. Perhaps @LaurenOE will drop in. She is a working pro and might have some advice. Steve Last edited by stevebrot; 06-30-2018 at 08:49 PM.

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06-25-2018, 06:08 AM	#2
victormeldrew Veteran Member Join Date: Jun 2015 Location: South West UK Photos: Albums Posts: 1,493	There is a guide here I found in the first result on google.

06-26-2018, 04:01 PM	#4
svnn New Member Join Date: Jun 2018 Posts: 10 Original Poster	Originally posted by stevebrot Welcome to the Pentax Forums! To the best of my knowledge, there are no native anamorphic lenses to K or M42 mounts* that I am aware of, though front-mount auxiliary anamorphic converter lenses are probably available. As always Google is our friend as is the Wikipedia. Anamorphic format - Wikipedia Out of curiosity, what use are you considering for such a lens? Steve * Or other mounts used by Asahi/Pentax cameras current or historic i know, but is there any pentax users tried an anamorphic lens stacked with pentax lens? because i don't know how to buy right anamorph mount and anamorph lens for my camera

06-26-2018, 04:17 PM	#5
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,406	Are you referring to something like this? SLR Magic Anamorphot-50 1.33x Anamorphic Adapter SLRA50-1.33X

06-27-2018, 12:42 PM	#6
svnn New Member Join Date: Jun 2018 Posts: 10 Original Poster	Originally posted by MarkJerling Are you referring to something like this? SLR Magic Anamorphot-50 1.33x Anamorphic Adapter SLRA50-1.33X yeah that's what i looking for, thanks

06-27-2018, 02:46 PM	#7
pentasonic49 Veteran Member Join Date: Oct 2012 Location: weston-super-mare Posts: 395	Not a cheap lens, better results by cropping a normal lens are likely, since you have to correct the distortion afterward anyway. It was used in the cine industry for widescreen coupled with compensating projector lenses.

06-27-2018, 02:52 PM	#8
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,406	Originally posted by svnn yeah that's what i looking for, thanks I'm interested to know why? Please do share!

06-28-2018, 11:28 AM	#9
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by MarkJerling I'm interested to know why? Please do share! Me too... Steve

06-29-2018, 06:03 AM	#10
victormeldrew Veteran Member Join Date: Jun 2015 Location: South West UK Photos: Albums Posts: 1,493	I am also interested

06-30-2018, 06:24 AM	#12
pentasonic49 Veteran Member Join Date: Oct 2012 Location: weston-super-mare Posts: 395	Sounds like very hard work, unless you have a software solution to processing the results automatically, as 1/2 an hour at 25fps would be 45000 separate images to cope with.

06-30-2018, 06:22 PM	#13
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,406	Originally posted by svnn i know right, because i'm working on cine industry i love it because it has rich of depth of field and details, also lessnoise in low light... if you want to know what anamorphic lens is a lens for film production international standar (CMIIW) you guys could check this guide like victormeldew said : i'm still about going to buy and start making a film using an anamorph with my pentax I struggle to see the point of it - unless you're shooting film and viewing film. Can you explain to me what I'm missing?

06-30-2018, 08:47 PM	#15
Bob 256 Site Supporter Join Date: Jun 2008 Location: Idaho Photos: Gallery Posts: 2,375	It probably applies to video more than it would to still photography since the image is compressed horizontally when it's stored and needs to be stretched when it's reproduced. As said, for prints, cropping would be a better solution, but when an image is projected (as with video), a reverse anamorph is used (can be the same one) to restore the widescreen rendition of the original shot using a base 16:9 frame (which is standardized). All of the resolution of the HD or UHD frame can be utilized instead of resorting to letterboxing which under utilizes all the available lines in the frame. The downside is potential lowered resolution due to imperfections in the anamorphic lens plus chromatic aberrations present in that lens, and some light falloff due to the increased spread of the image.