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24-70 light leak

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Does this light leak occur on DX? I can't get it to occur with my D300s, even at ISO 6400 and a 30s exposure. Do you have a DX body to try this on to compare your results?
Mark den Hartog said:
I tested mine and it does show it at real high iso's and long exposures 10-20 secs.

but it s more of a blur and it also shows it at wider settings. So would that be considered normal? I mean do all lenses show this minor lightleaking.
Sorry I didn't put a picture
but it's nowhere near as bad as in this video

http://www.youtube.com/watch?v=dhEZssWmAsM&feature=player_embedded
Click to expand...
--
John Tatyosian
Check out my site: http://sites.google.com/site/JTatyosian
 
good point I will try this! but I already think that you will see it... the leak was large in surface area but just not so bright.

I must admit that I aimed the screen to a fullblown sun. putting my finger on it solved it.
 
I have had no problems with my 24-70 taking 30 sec exposures with my 10 stop ndf @ iso 200-6400 in direct sunlight.
 
I have a flash light pointed directly over the focus screen. It should have been enough light, but i suppose I can try it again under the sun. Let me know how your DX results turn out.
Mark den Hartog said:
good point I will try this! but I already think that you will see it... the leak was large in surface area but just not so bright.

I must admit that I aimed the screen to a fullblown sun. putting my finger on it solved it.
Click to expand...
--
John Tatyosian
Check out my site: http://sites.google.com/site/JTatyosian
 
yes I did,.. I tried from 70 till 24 in 10 mm increments.

also I did already shoot 2 mins with ND in bright light and there was no (evident) problem. but at 6400 and up it does occur and is evident.
 
I have no idea if all lenses do it. Let me put it another way: If I have to be told where and when and how to trigger the problem, and then still can't really be sure what is and isn't going on....it isn't really a problem after all.

I'm all for the theoretical "always aim for the best." But sometimes, if in fact there is no one there to hear it, the tree really didn't make a sound when it fell. It just didn't.
 
If that's on FX then it would outside the DX sensor area, which explains why DX shooters don't seem to have it.

--
Ai-S all the way!
 
Here are some of the criteria I've come across:

It is most apparent at 55mm.

The light source has to be coming from a certain direction. This will affect where it falls on the frame, if at all. One sample I've seen had the light falling near the center of the frame. So, it could hit DX. Most fall at the upper left of FX.

If your shooting never meets the criteria that causes it, you wont see it. Doesn't mean your lens is without the flaw. It may bite you when you are shooting a great once-in-a-lifetime shot. Or, it may not. Put tape on it, send it back to Nikon, or gamble. Your choice.

I got the effect at ISO 200 and 1/30 sec. on a D700. This is a 100% crop.



--
Robin Casady
http://www.robincasady.com/Photo/index.html
 
I can readily reproduce this on mine and two other peoples' 24-70/2.8G with the following steps: ND110 filter, ISO200, f/2.8, 15sec, stand next to patio window (cloudy skies) in house with lens pointing towards window (focus scale window is not directly pointing towards window) and at 55mm (it happens in a narrow band around 55mm). If you have a problem you observe a faint skewed rectangle in the top left corner in landscape orientation, brighter if using a more direct light source.

Fortunately in real world shooting you shouldn't readily observe this issue. For people who like to do long exposures in daylight using ND110 or higher filter factor filters (i.e. some architectural photography where there is a style to blur the clouds, or landscapes for blurred/smoothed water) it may become a problem but then I would normally be using this lens at it's wider end.
 
old news now.

I found out it depends on what serial number you got on the lens.

the 2xxxxx series has the issue , just make sure to pick up the latest one with 4xxxxx serial numbers, then you will be fine.

mine has 464893 and no issue.

http://www.photosynthesis.co.nz/nikon/lenses.html
Mark den Hartog said:
I tested mine and it does show it at real high iso's and long exposures 10-20 secs.

but it s more of a blur and it also shows it at wider settings. So would that be considered normal? I mean do all lenses show this minor lightleaking.
Sorry I didn't put a picture
but it's nowhere near as bad as in this video

http://www.youtube.com/watch?v=dhEZssWmAsM&feature=player_embedded
Click to expand...
 
pandalee said:
old news now.

I found out it depends on what serial number you got on the lens.

the 2xxxxx series has the issue , just make sure to pick up the latest one with 4xxxxx serial numbers, then you will be fine.

mine has 464893 and no issue.
Click to expand...
Mine has a US 39xxxx serial number and it has the problem. So, not just the 2xxxxx have the problem. How did you find out that the 4xxxxx versions don't have the problem? I'd like to be sure that Nikon has a good fix for it before I send mine in.
--
Robin Casady
http://www.robincasady.com/Photo/index.html
 
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