Why did this happen with M plus Noctilux combination

[Paul J]

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I would personally just spend the MM money on lenses for your M as this B+W conversion looks bloody good.

[Guest NEIL-D-WILLIAMS]

(unless you plan on getting an a7r).

That is plain right "Poison" I am getting ready to go back to work and I get those urges when offshore to buy, buy, buy…………..so please don't mention the A7R again:D

[Numbers]

could it be???.......did you eat anything containing mayonnaise....before setting up the camera?

[Guest NEIL-D-WILLIAMS]

could it be???.......did you eat anything containing mayonnaise....before setting up the camera?

Must be a German thing

[Guest NEIL-D-WILLIAMS]

OK well I have been doing my own testing and this is what I found. All shots with a 30 sec exposure

With the 21mm Lux I got no light getting past the mount with both the lens supported or not supported

With the Noctilux I got a bunch of light getting onto the sensor via the lens mount with the lens not supported (like you would if you had the camera mounted on a tripod) but with the lens supported i.e sat on the bed I got no light on the sensor…………..the M mount doesn't like the fat bastard Noctilux

Not bad for a 7K camera:mad:

Picture below

1/. 21mm supported

2/. 21mm not supported

3/. Noctilux not supported

4/. Noctilux supported

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[jaapv]

The problem is caused by the “fingers” of the bayonet having springs. Though normally strong enough to press a lens firmly against the flange they may give minimally with heavy lenses, creating a minimal light leak in extreme circumstances like long shutter times in bright light, as with an ND filter. Actually it is an internal reflection of a light leak which explains the position.

[Guest NEIL-D-WILLIAMS]

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Also jaap when out shooting normally with the Noctilux my left hand is supporting the weight of it as that hand is controlling focus and aperture …………….so not really bothered about it

But nice to know that if I want to do more of this kind of photography with this lens then I will need to re-think how I do it

[jaapv]

But I guess, Neil, that you took your water shots with the ND filter from a tripod.

[Guest NEIL-D-WILLIAMS]

But I guess, Neil, that you took your water shots with the ND filter from a tripod.

Yes Sir which would account for the lens not being supported

[algrove]

Neil get a 3 stop ND filter and see how that works. It should bring your shutter times down, but might not create a lot of blur. Then again, it could save your shots from what you originally posted.

[quadraticadder]

OK well I have been doing my own testing and this is what I found. All shots with a 30 sec exposure

With the 21mm Lux I got no light getting past the mount with both the lens supported or not supported

With the Noctilux I got a bunch of light getting onto the sensor via the lens mount with the lens not supported (like you would if you had the camera mounted on a tripod) but with the lens supported i.e sat on the bed I got no light on the sensor…………..the M mount doesn't like the fat bastard Noctilux

Not bad for a 7K camera:mad:

Picture below

1/. 21mm supported

2/. 21mm not supported

3/. Noctilux not supported

4/. Noctilux supported

 

Ouch! This is worrisome. Especially if one wants to mount some of the heavier R lenses on the M. What would happen if it rained with a heavy lens mounted on the M? Reading this, and the other threads about light leaks, blackout issues, etc. I must say, I'm getting cold feet, and I'm tempted to cancel my M order. Not good.

 

Best,

Steve

[Guest NEIL-D-WILLIAMS]

Neil get a 3 stop ND filter and see how that works. It should bring your shutter times down, but might not create a lot of blur. Then again, it could save your shots from what you originally posted.

Got one already…………..On another tread they say that they have solved it with a ladies black hair band around the lens mount…………..I will give that a shot later today:D

[marcg]

Probably the flange light leak that is discussed in this thread. It happens on the M9 and the MM on long exposures under lighted conditions (I.e. When using a 10 stop ND filter). Some have confirmed the issue exists with the M240 also.

http://www.l-camera-forum.com/leica-forum/2508994-post.html

 

Yes - Have you looked at this very recent post http://www.l-camera-forum.com/leica-forum/leica-m9-forum/300680-monochrom-long-exposure-issue-3.html#post2551086 where there seems to be a particular problem with the Noctilux

[jaapv]

Ouch! This is worrisome. Especially if one wants to mount some of the heavier R lenses on the M. What would happen if it rained with a heavy lens mounted on the M? Reading this, and the other threads about light leaks, blackout issues, etc. I must say, I'm getting cold feet, and I'm tempted to cancel my M order. Not good.

 

Best,

Steve

Heavier R lenses often have their own tripod mount and are unlikely be used at such long exposures. I have had no problems using the Visoflex with lenses up to 560 on any M camera, nor using the Vario Elmar 105-280, sometimes with extender, (over 2 Kg(!)) on the M.

[jaapv]

Got one already…………..On another tread they say that they have solved it with a ladies black hair band around the lens mount…………..I will give that a shot later today:D

 

Do ask permission to remove it…

[MarkP]

I agree that this may be due to the dreaded light leak that occurs with the M9, Monochrom, and M240. I have had this problem myself with a x10 ND filter.

 

The light leak is at the mount at about 2 to 3 o'clock and leads to flare regularly occurring in the lower right corner of the photograph. It is typically induced by long exposures during daylight such as with a 10x ND filter. I have been able to reproduce it by shining a focused light source around the lens mount ring. You can easily reproduce it yourself. As mentioned above, someone has very recently commented that the weight of the Noctilux on the mount may make the problem worse.

[farnz]

There is a way to correct this but you need to fight your way three quarters the Dan Margulis’

The Canyon Conudrum and other Adventures to understand it….

Neil,

 

I hope you don't mind but I've used your picture to demonstrate what Jaap was alluding to. I pulled the picture into PSCS5, converted to LAB colour, added a Curves adjustment layer, adjusted the curve so that the affected part looked about right, swapped the adjustment layer mask with an inverted mask and painted the contrast back in with a large soft brush to suit.

 

I did it as a quick demonstration so it's unlikely to precisely match the scene you remember and you may consider that more flare needs removing but with a little more time it could be adjusted satisfactorily. The point to note is that the delicate grass colours on the left and right have been retained but this wouldn't have been easy using a Curves layer in RGB colour space.

 

Pete.

 

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[quadraticadder]

I agree that this may be due to the dreaded light leak that occurs with the M9, Monochrom, and M240. I have had this problem myself with a x10 ND filter.

 

The light leak is at the mount at about 2 to 3 o'clock and leads to flare regularly occurring in the lower right corner of the photograph. It is typically induced by long exposures during daylight such as with a 10x ND filter. I have been able to reproduce it by shining a focused light source around the lens mount ring. You can easily reproduce it yourself. As mentioned above, someone has very recently commented that the weight of the Noctilux on the mount may make the problem worse.

 

Can it happen with a 35 mm summicron?

Best,

Steve

[algrove]

Ouch! This is worrisome. Especially if one wants to mount some of the heavier R lenses on the M. What would happen if it rained with a heavy lens mounted on the M? Reading this, and the other threads about light leaks, blackout issues, etc. I must say, I'm getting cold feet, and I'm tempted to cancel my M order. Not good.

 

Best,

Steve

 

Not had this occur with a multitude of long and heavy R lenses while on the M. Of course I use the tripod mount on all R lenses that have such a device. Have used the 28-90 extensively on my M's and no light leaks. I do not use a collar on it , but started using the RRS QR MPR-113 base plate on camera base and then later once released the RRS QR L bracket/grip setup for the M. Lately I have found the RRS MC-L, L bracket to be very convenient and it is my best alternative when using any new M grip with some adjustments as mentioned on a MF grip thread.

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Hallo,

Look here: Leica M

[jaapv]

Can it happen with a 35 mm summicron?

Best,

Steve

Unlikely