Jump to content


Photo

Digital SLR with a PL mount


  • Please log in to reply
11 replies to this topic

#1 Michael B McGee

Michael B McGee
  • Basic Members
  • PipPip
  • 73 posts
  • Cinematographer
  • Santa Monica, CA

Posted 30 March 2009 - 09:10 PM

ok, i might be crazy but i swear i've seen a digital slr with a pl mount. it might have been a Leica even. i tried an internet search but no such luck. has anyone here seen or heard of what i'm talking about?

thanks.
  • 0

#2 Chris Keth

Chris Keth
  • Sustaining Members
  • 4427 posts
  • 1st Assistant Camera
  • Los Angeles

Posted 31 March 2009 - 08:07 PM

There aren't any that are made with one. You can have adapters made that would let you put some PL mount lenses on an SLR, though most won't cover full frame 35. There are also issues of mirror clearance with many of the lenses whose back elements sit very close to the film.
  • 0

#3 Tom Hall

Tom Hall
  • Basic Members
  • PipPip
  • 21 posts
  • Cinematographer
  • Toronto

Posted 01 April 2009 - 12:34 AM

You can't really mount a PL lens on a SLR because of the mirror. That leica was likely a rangefinder.
  • 0

#4 John Sprung

John Sprung
  • Sustaining Members
  • 4635 posts
  • Other

Posted 01 April 2009 - 04:31 PM

I don't see why the mirror geometry would necessarily be a big problem. The close edge of the mirror is near the perfs, and it's at a 45 degree angle to the film plane on both an SLR and a traditional side shuttered film camera such as an Arri II-C or any of the Panaflexes, etc. If anything, the circular edge of the motion picture shutter requires it to be out a tad farther than the straight edge of a still shutter. PL's 52mm flange focal distance is close to a lot of SLR's, which may make some adapters impossible. The main issue is that the vast majority of PL lenses won't come anywhere close to covering the whole still/VistaVision size frame.



-- J.S.
  • 0

#5 David Auner aac

David Auner aac
  • Sustaining Members
  • 1117 posts
  • Cinematographer
  • Los Angeles

Posted 02 April 2009 - 02:14 AM

The main issue is that the vast majority of PL lenses won't come anywhere close to covering the whole still/VistaVision size frame.


Then again, that might not matter too much as a lot of DSLRs have APS-C chips which is pretty close to academy 35mm. So such an adapter could turn your DSLR into a really nice finder! How far past the bayonet does the rear element protrude on PL lenses? Worst Case?

Cheers, Dave
  • 0

#6 Bruce Greene

Bruce Greene
  • Basic Members
  • PipPipPipPip
  • 489 posts
  • Cinematographer
  • Los Angeles

Posted 08 April 2009 - 12:22 AM

ok, i might be crazy but i swear i've seen a digital slr with a pl mount. it might have been a Leica even. i tried an internet search but no such luck. has anyone here seen or heard of what i'm talking about?

thanks.


You might be crazy, but check this out:


It's not a DSLR, but takes interchangeable lenses and has no mirror to worry about. You could easily build an adapter for PL lenses for this camera and the imager is about the same size as a movie frame.
  • 0

#7 John Sprung

John Sprung
  • Sustaining Members
  • 4635 posts
  • Other

Posted 08 April 2009 - 01:31 AM

How far past the bayonet does the rear element protrude on PL lenses? Worst Case?


PL lenses have to work on mirror shutter cameras, so figure with the mirror at a 45 degree angle to the film, and the lens symmetrical around its axis, you have a cone with the point at least half the width of the aperture away from the focal plane. So, you've got at least 12 mm from the rear element to the film. Given a 52 mm flange focal distance, the absolute worst is no more than 40 mm.




-- J.S.
  • 0

#8 Patrick Neary

Patrick Neary
  • Basic Members
  • PipPipPipPip
  • 873 posts
  • Cinematographer
  • Portland, OR

Posted 08 April 2009 - 07:37 PM

I don't see why the mirror geometry would necessarily be a big problem. The close edge of the mirror is near the perfs, and it's at a 45 degree angle to the film plane on both an SLR and a traditional side shuttered film camera such as an Arri II-C or any of the Panaflexes, etc. If anything, the circular edge of the motion picture shutter requires it to be out a tad farther than the straight edge of a still shutter.
-- J.S.


the big difference is that the slr's mirror doesn't sit in that 45-degree plane, it flaps up to the ground glass/viewfinder screen at every exposure, so anything in the way is going to get smacked! (usually to the mirror's detriment...)
  • 0

#9 John Sprung

John Sprung
  • Sustaining Members
  • 4635 posts
  • Other

Posted 08 April 2009 - 11:40 PM

Ah, thanks. That makes sense.



-- J.S.
  • 0

#10 Stephen Williams

Stephen Williams
  • Sustaining Members
  • 4708 posts
  • Cinematographer
  • Europe

Posted 09 April 2009 - 02:33 AM

ok, i might be crazy but i swear i've seen a digital slr with a pl mount. it might have been a Leica even. i tried an internet search but no such luck. has anyone here seen or heard of what i'm talking about?

thanks.


Hi,

Steve Morton in Austraila made a PL mount for a Leica rangefinder (digital) a couple of years ago.

Stephen
  • 0

#11 Jean Dodge

Jean Dodge
  • Basic Members
  • PipPipPip
  • 110 posts
  • Director

Posted 18 April 2009 - 01:31 AM

FWIW that Panasonic G1 is about to be superseded by a model that nominally shoots 24p HD video, with manual controls for ISO and shutter speed.

http://www.g1hd.net/

And no, I don't wanna talk about what this might mean.
  • 0

#12 Peter J DeCrescenzo

Peter J DeCrescenzo
  • Sustaining Members
  • 620 posts
  • Camera Operator
  • Portland, OR, USA www.peterdv.com Blog: http://herefortheweather.wordpress.com/

Posted 18 April 2009 - 02:23 AM

FWIW that Panasonic G1 is about to be superseded by a model that nominally shoots 24p HD video, with manual controls for ISO and shutter speed.
http://www.g1hd.net/

And no, I don't wanna talk about what this might mean.


Hi Jean,

FYI: We've been discussing the GH1 in the Panasonic HD forum here on Cinematography.com for a couple of weeks. Among other details, included are links to a few suppliers of lens mount adapters for this cam. I don't know if a PL adapter is possible for the GH1 or if one exists, regrets. See:
http://www.cinematog...showtopic=37701

All the best,

- Peter
  • 0


Glidecam

Media Blackout - Custom Cables and AKS

Visual Products

CineTape

CineLab

Abel Cine

The Slider

Metropolis Post

Rig Wheels Passport

rebotnix Technologies

Tai Audio

FJS International, LLC

Technodolly

Wooden Camera

Aerial Filmworks

Opal

Broadcast Solutions Inc

Gamma Ray Digital Inc

Paralinx LLC

Willys Widgets

Ritter Battery

The Slider

Willys Widgets

Technodolly

Rig Wheels Passport

Glidecam

CineLab

rebotnix Technologies

Broadcast Solutions Inc

Ritter Battery

Tai Audio

Wooden Camera

Aerial Filmworks

Media Blackout - Custom Cables and AKS

Abel Cine

Metropolis Post

Opal

FJS International, LLC

Paralinx LLC

Gamma Ray Digital Inc

CineTape

Visual Products