Jump to content


Photo

HD100 chromatic aberration :(... remedies?


  • Please log in to reply
6 replies to this topic

#1 Alex Aust

Alex Aust
  • Basic Members
  • PipPip
  • 15 posts
  • Cinematographer

Posted 31 January 2010 - 06:12 AM

i really like the HD100 for its ergonomics, the quality of the head and processing and for the option to record uncompressed from the analog output; but for most stuff we do, it is unuseable just because of those chromatic aberrations all over the place. so i am thinking about a way to bypass the problem.

1.: is this simply a lens issue or is it also related to the prism and LP-filter design of the sensor block?

2.: if it is only a lens issue, which are my lens options to remedy the thing?

3.: if it's not solveable with any other EB lens, what happens if one uses a directly attached mini35 adapter like the P+S? any info and shared experiences on this one are hugely appreciated

ok guys i hope i'm not completely off the tracks with my thinking in this issue and hope for lots of feedback coming. and please don't beat me if you feel like there's already a ton of threads about this here because i did search on this forum and elsewhere but didn't get satisfying results.
  • 0

#2 Phil Rhodes

Phil Rhodes
  • Sustaining Members
  • 12167 posts
  • Other

Posted 31 January 2010 - 07:21 AM

1.: is this simply a lens issue or is it also related to the prism and LP-filter design of the sensor block?


It's mainly, if not solely, the lens. I've seen HD100s and 250s with the better lens on, and it makes a vast difference.

2.: if it is only a lens issue, which are my lens options to remedy the thing?


Buy a better lens. I hope you have a lot of money.

3.: if it's not solveable with any other EB lens, what happens if one uses a directly attached mini35 adapter like the P+S? any info and shared experiences on this one are hugely appreciated


Meh. Those things have problems of their own, and you're likely to swap one set of CA for another set of noise, veiling and focus issues.

Get a better lens, but as I say, it's likely to be a spendy operation. It's a tiny sensor, so landing a decent image on it requires really nice glass.

Personally I found this got a lot better when you stop down a bit, too, so don't throw it wide open and get depressed about what it does. It's never brilliant, but it's particularly awful at the long end of the zoom when opened right up.

P
  • 0

#3 Thomas James

Thomas James
  • Basic Members
  • PipPipPipPip
  • 844 posts
  • Camera Operator

Posted 31 January 2010 - 12:04 PM

Rather than spend thousands of dollars on new glass one option may be to trade in the camera to a JVC GY-HM700 which includes a Canon lens.
  • 0

#4 Alex Aust

Alex Aust
  • Basic Members
  • PipPip
  • 15 posts
  • Cinematographer

Posted 01 February 2010 - 06:38 AM

any experiences with adapters with regard to the CA issue? thanks!
  • 0

#5 Adrian Sierkowski

Adrian Sierkowski
  • Sustaining Members
  • 7373 posts
  • Cinematographer
  • Los Angeles, Ca

Posted 01 February 2010 - 06:45 AM

Unless you're using good lenses on the end of the adapter you're hazarding CA. Stills lenses also rarely match lens to lens even out of the same series, among other problems. The only way to mitigate CA with an adapter would be to use high end glass, which puts you back a few pegs towards square one. Also an adapter has an overall softening effect on the image much like a diffusion filter. Now, whether or not that suits the particular film/shot is a matter of taste.
  • 0

#6 Alex Aust

Alex Aust
  • Basic Members
  • PipPip
  • 15 posts
  • Cinematographer

Posted 01 February 2010 - 12:53 PM

thanks for all the feedback. however what i'm actually tryin to find out is wheather the camera head itself is somewhat flawed, be it prism design/built, LP-filter, whatever, or if its really just a lens issue... u know, think of an adapter/lens combo which is fine CA-wise on, say the sony Z1, but on the HD100, pictures still have that fringing all over the place. that would indicate something more deep inside the camera is flawed.
  • 0

#7 Steve Phillipps

Steve Phillipps
  • Basic Members
  • PipPip
  • 28 posts
  • Camera Operator

Posted 04 April 2010 - 04:41 PM

thanks for all the feedback. however what i'm actually tryin to find out is wheather the camera head itself is somewhat flawed, be it prism design/built, LP-filter, whatever, or if its really just a lens issue... u know, think of an adapter/lens combo which is fine CA-wise on, say the sony Z1, but on the HD100, pictures still have that fringing all over the place. that would indicate something more deep inside the camera is flawed.


These aberrations are lens-related for sure. You'll almost certainly find the same effects on different cameras with the same lenses. A lot of the modern cameras now are incorporating chromatic aberration correction systems which work on an individual basis with each lens (the lens has to be compatible, with its data input into the camera so it knows what to do to correct that particular lens).
This seems definitely to be in response to the "cheap" lenses coming onto the market now, to go with the "cheap" cameras. I think the manufacturers realised when releasing the likes of the Sony EX3 and Panasonic HPX300 and 500 that the body was to be around £4-5000 and the lenses available for them at the time would be much more than double the price of the camera!
Steve
  • 0


Wooden Camera

Willys Widgets

Aerial Filmworks

The Slider

Abel Cine

Paralinx LLC

Tai Audio

CineLab

Ritter Battery

Rig Wheels Passport

Visual Products

Broadcast Solutions Inc

rebotnix Technologies

Glidecam

Metropolis Post

FJS International, LLC

New Pro Video - New and Used Equipment

Gamma Ray Digital Inc

Media Blackout - Custom Cables and AKS

Technodolly

CineTape

Glidecam

Abel Cine

Ritter Battery

Aerial Filmworks

Gamma Ray Digital Inc

Wooden Camera

CineTape

Paralinx LLC

Tai Audio

Metropolis Post

New Pro Video - New and Used Equipment

Technodolly

Rig Wheels Passport

Visual Products

rebotnix Technologies

The Slider

Broadcast Solutions Inc

CineLab

Willys Widgets

Media Blackout - Custom Cables and AKS

FJS International, LLC