A7/A7R Light leaks reported + White Orbs issue?

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captura Forum Pro • Posts: 21,540
A7/A7R Light leaks reported + White Orbs issue?
5

"A7/A7R Light leaks

- from Alpha NEX Cameras, borrowed with thanks!

http://community.sony.com/t5/Alpha-NEX-Cameras/A7-A7R-Light-leaks/td-p/254835

12-26-2013 09:05 AM - edited ‎12-26-2013 09:06 AM

People in these two groups have found a light leaking issue that occurs from the mount on camera. https://www.facebook.com/groups/184416535083113/

https://www.facebook.com/groups/SonyAlphaTalk/
Here is a photo of the light leak. I did a simple test putting the lens cap on and shot at iso 25600 for 20 seconds in low indoor lighting.

A Person in both groups took a long real world exposure and the light leaks did affect the outcome of his photograph.

Looking at the two photos together the light leaks look like they are coming from the same points. More people have confirmed this in the groups. Also the same person that took the photo above found that the e mount is squishy. He also has seemed to have found a temporary solution

"So I am now more convinced than ever that the source of the major light leak, the crescent leak showing up on the upper right quadrant of the image, is caused by that slight gap between the silver flange and the resin substrate. To get rid of it, all I needed to do was apply a very thin strip of gaffer's tape to the gap between the silver flange and the orange ring (see pic). Note that this isn't covering the space between the orange ring and the body nor is it really providing a good shield between the flange and the rear of the lens. It's just covering the gap between the flange and the orange ring, and that takes care of the crescent light leak "

The tape idea was found on twitter http://twitpic.com/dpocow

=========================================

Re: White Orbs issue now on Sony A7?

- continued from "Problem with Sony A7, reflections on the sensor."

http://www.dpreview.com/forums/post/53072031

Fuji X10 issue re-visited?

Fujifilm X10 Sony Alpha 7
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ethern1ty Regular Member • Posts: 291
Re: A7/A7R Light leaks reported + White Orbs issue?
1

I checked on my A7r with the 35mm f2.8. No issue at all... (30s exposure, f22 (to avoid lens cap issue) at ISO 26500).

If they have using an adapter, the leak might come the adapter. (I got one of the first model).

I got one of the first model. I shoot regularly using long exposure (using 35mm and today 55mm and haven't see the issue at all !)

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Chad Hardy
Chad Hardy Senior Member • Posts: 1,191
Re: A7/A7R Light leaks reported + White Orbs issue?
1

Spent the last 30 minutes reading posts.  Tested my a7 with FE 35mm, 30s iso 25600 at 3 o'clock with a bright flashlight.  No leaks.

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Beaverhelmet Senior Member • Posts: 1,494
Re: A7/A7R Light leaks reported + White Orbs issue?
1

Same here, no problems with my A7R. Tried both the Metabones adapter and a cheap Fotasy. 30s exposure, ISO 26500. Pulled a neoprene pouch over the lens and half of the adapter to rule out anything else than the camera mount, placed the camera on the window sill for full light bombardment. Got nothing but black frames. This seems to me more like a quality issue than a design flaw.

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stevo23 Forum Pro • Posts: 10,120
No leak for me

No leaks here as far as I can tell.

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Kiichiro Contributing Member • Posts: 515
Re: A7/A7R Light leaks reported + White Orbs issue?

Not sure what these purple things are but I don't think it's light leak. I think people should blame their adapters. Try using FE lens and see if it has light leaks.

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captura OP Forum Pro • Posts: 21,540
Re: A7/A7R Light leaks reported + White Orbs issue?

I guess the light leaks were a one-off quality issue, as suggested.

Anyone getting the white orbs?

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Kiichiro Contributing Member • Posts: 515
Re: A7/A7R Light leaks reported + White Orbs issue?

I tried to get white orbs but I dont know how. Can you suggest a setting for me to try?

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RichardLarssen
RichardLarssen Senior Member • Posts: 1,028
Leak confirmed on my A7 (1 photo)

I just tested this with a led lenser L7 on the mount of the A7. Same result with the 10-18mm and the FE35. taped the whole lens under testing so the leak must be in the mount. 30 sek exposure, 25600. Did the same thing with the nex-6, no leak. Also tested the A77 and 70-400 G II, no leak. Does Sony know about this?

If it will be an issure in the real world? Naw, i dont think so but anyway!!

cheers and good weekend

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robert1955 Senior Member • Posts: 2,477
A7 No White Orbs issue?

From the linked thread a gather that some [but not all] users can reproduce a flare like issue with colored [blue and or green) circles appearing near an intense (blown out?) light source (street light, sun). As far as I've seen it has so far not been observed with the A7r, leading to speculation that it may have to do with differences in the sensor stack.

It seems different IMO from the white orbs seen with some Fuji Xtrans sensors which was a form of blooming. That AFAIK has not been shown with the Sony.

captura wrote:

Re: White Orbs issue now on Sony A7?

  • continued from "Problem with Sony A7, reflections on the sensor."

http://www.dpreview.com/forums/post/53072031

Fuji X10 issue re-visited?

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SQLGuy Veteran Member • Posts: 4,034
Re: Leak confirmed on my A7 (1 photo)

Just tried mine under some direct light in the kitchen (25600, 30sec).

First test was with a body cap on. The result was a fairly uniform red frame.

Second was same setup in a dark room, to see whether light leak was the cause. Sure enough, this was dark grey instead of red.

Third was back under the lights with the kit zoom and its lens cap and hood. That was uniform almost black.

Last test was with a Fotasy Canon FD adapter and an nFD 35/2 with its cap on. This resulted in an almost black screen with a bit of a dim red streak in one corner. I guess the adapter does leak. It should be noted that the E-mount end of the adapter has thinner parts, especially the bayonet and tube wall, than the native kit zoom's mount.

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A7 with kit lens and a number of legacy lenses (mostly Canon FD)

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RichardLarssen
RichardLarssen Senior Member • Posts: 1,028
Re: Leak confirmed on my A7 (1 photo)

SQLGuy wrote:

Just tried mine under some direct light in the kitchen (25600, 30sec).

First test was with a body cap on. The result was a fairly uniform red frame.

Second was same setup in a dark room, to see whether light leak was the cause. Sure enough, this was dark grey instead of red.

Third was back under the lights with the kit zoom and its lens cap and hood. That was uniform almost black.

Last test was with a Fotasy Canon FD adapter and an nFD 35/2 with its cap on. This resulted in an almost black screen with a bit of a dim red streak in one corner. I guess the adapter does leak. It should be noted that the E-mount end of the adapter has thinner parts, especially the bayonet and tube wall, than the native kit zoom's mount.

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A7 with kit lens and a number of legacy lenses (mostly Canon FD)

I also tested first with the cap "untaped", more leak so i taped the whole thing with plastic foil under to avoid a sticky lens:) no adapter used. I dont like this! The lenses are weather sealed but not the mount is not light sealed, sigh....

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SQLGuy Veteran Member • Posts: 4,034
Re: Leak confirmed on my A7 (1 photo)

Note that I did not see any leak with the kit zoom. Are you expecting the lens mount to compensate for deviations from mount spec by 3rd party adapter manufacturers?

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A7 with kit lens and a number of legacy lenses (mostly Canon FD)

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socode Regular Member • Posts: 356
Re: Leak confirmed on my A7 (1 photo)

richard NO wrote:

I just tested this with a led lenser L7 on the mount of the A7.

Interestingly I could reproduce it on one cheap legacy adapter but not two others. Mount looks OK here.

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captura OP Forum Pro • Posts: 21,540
Re: A7/A7R Light leaks reported + White Orbs issue?

Kiichiro wrote:

I tried to get white orbs but I dont know how. Can you suggest a setting for me to try?

Try it at night where there are streetlights and/or car headlights. A big flare is what you will see if you have it. You will either have White Orbs or you won't because that's what owners of the original 14xxxx series of Fuji X10 experienced. Some had it and some didn't. I had one of each.

Not: it has not yet been established as to whether the A7 has a White Orbs issue. Let's all work together on that puzzle.

see:

Re: White Orbs issue now on Sony A7?

- continued from "Problem with Sony A7, reflections on the sensor."

http://www.dpreview.com/forums/post/53072031

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captura OP Forum Pro • Posts: 21,540
Re: A7 No White Orbs issue?

robert1955 wrote:

From the linked thread a gather that some [but not all] users can reproduce a flare like issue with colored [blue and or green) circles appearing near an intense (blown out?) light source (street light, sun). As far as I've seen it has so far not been observed with the A7r, leading to speculation that it may have to do with differences in the sensor stack.

It seems different IMO from the white orbs seen with some Fuji Xtrans sensors which was a form of blooming. That AFAIK has not been shown with the Sony.

captura wrote:

Re: White Orbs issue now on Sony A7?

  • continued from "Problem with Sony A7, reflections on the sensor."

http://www.dpreview.com/forums/post/53072031

Fuji X10 issue re-visited?

Well this guy reported it with his A7, and the question is, was the only one, or are there others, and how many? Strangely the thread was cut short after less than 100 messages: What's going on?

Steve

========================

Problem with Sony A7, reflections on the sensor. 1 week ago

http://www.dpreview.com/forums/post/52986111

"Sorry for my English! Sony A7 has this serious problem, you can also check it by clicking F8 to F22. We must point out the problem to Sony who can help me?"

Thanks

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PVCdroid
PVCdroid Senior Member • Posts: 3,635
Re: A7/A7R Light leaks reported + White Orbs issue?
1

Beaverhelmet wrote:

Same here, no problems with my A7R. Tried both the Metabones adapter and a cheap Fotasy. 30s exposure, ISO 26500. Pulled a neoprene pouch over the lens and half of the adapter to rule out anything else than the camera mount, placed the camera on the window sill for full light bombardment. Got nothing but black frames. This seems to me more like a quality issue than a design flaw.

The poster reporting the problem is kind of suspect since they said Sony wouldn't give them a support reference number.

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blue_skies
blue_skies Veteran Member • Posts: 9,413
Re: A7 No White Orbs issue?

captura wrote:

Well this guy reported it with his A7, and the question is, was the only one, or are there others, and how many? Strangely the thread was cut short after less than 100 messages: What's going on?

Steve

Steve, that thread is at 150 messaage (149 responses). Threads auto-lock at 150 messages.

Read ProfHandD's response in that thread, as it supports my comments in that same thread:

http://www.dpreview.com/forums/post/53072446

The problem manifests itself by:

  1. High dynamic range of the sensor, making reflections perceptible if
  2. Highlights are dramatic (bright lights on a dark background, sun in frame)
  3. The shot is over-exposed (highlight at, or close to blow-out)
  4. Using a stopped down aperture
  5. Use of short-flange lens (typically WA RF lens)

Remove one or two of these variables and the problem goes away,

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Cheers,
Henry

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John Triebe Contributing Member • Posts: 678
Re: A7/A7R Light leaks reported + White Orbs issue?

Unfortunately, I have the "light leak" problem with my A7r. I tested both my Zeiss 55mm f1.8 and the 35mm f2.8 and they both exhibit the problem:

This one is with the 55mm wherein I used a flashlight and shined it completely around the lens mount.

FE 55mm  f1.8, ISO 25600 and 20 second exposure

For this one everything was the same except I just shined the light at the 3 o'clock position.

FE 55mm f1.8, ISO 25600 and 20 second exposure

This was with the FE 35mm f2.8, but just illuminating at the 3 o'clock position

FE 35mm f2.8, ISO 25600 and 20 second exposure

This last one is without illuminating the lens mount but exposing in a room with normal "low" light levels

FE 35mm f2.8, ISO 25600 and 20 second exposure, but in normal, low level room light

Looks like this camera is going back to Sony.

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captura OP Forum Pro • Posts: 21,540
Re: A7 No White Orbs issue?

blue_skies wrote:

captura wrote:

Well this guy reported it with his A7, and the question is, was the only one, or are there others, and how many? Strangely the thread was cut short after less than 100 messages: What's going on?

Steve

Steve, that thread is at 150 messaage (149 responses). Threads auto-lock at 150 messages.

Read ProfHandD's response in that thread, as it supports my comments in that same thread:

http://www.dpreview.com/forums/post/53072446

The problem manifests itself by:

  1. High dynamic range of the sensor, making reflections perceptible if
  2. Highlights are dramatic (bright lights on a dark background, sun in frame)
  3. The shot is over-exposed (highlight at, or close to blow-out)
  4. Using a stopped down aperture
  5. Use of short-flange lens (typically WA RF lens)

Remove one or two of these variables and the problem goes away,

-- hide signature --

Cheers,
Henry

Good to know Henry. So you are saying there is not a chance of a White Orb issue, and we should drop it?

Steve

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