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Can someone tell me what happened here?


hteasley

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I took pictures of my daughter's music concert, M8 and 35mm Summicron IV, and I got this ghosting of the window behind them in most of the photos. What caused this? What would have been the best way to avoid it? Could I have avoided it without moving my seat?

 

It was pretty dim in they gym, there, so I was shooting at f2.

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Are you speaking of the problems with the windows, or of the window reflections? If the latter, it's just a reflection from the sensor onto the filter and back through the lens. Take off the filter to avoid it.

 

 

If the former, to me it looks like "blooming" or "purple fringing" or both. Search for either with the forum's search function.

 

There are different theories as to why they occur.

 

Basically, you've got a good exposure indoors but with so much light coming through the windows that it completely overexposes.

 

Then digital effects occur, causing the weird colors.

 

Seems to be somewhat dependent on lens used, but IIRC it's almost always when the lens is open all the way. It's not the lens's fault, but a combination of the lens behavior with the sensor behavior.

 

The way to avoid it is to avoid having such a gross overexposure next to a proper exposure.

 

Something else: Some RAW processors handle this kind of problem better than others. In my personal experience Adobe Camera RAW was very bad with it maybe five years ago, but has improved quite a bit. Some people on the forum have said that Capture One will handle it better than the Adobe products.

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Normal issue in indoors pics with windows taken directly... a too wide EV range for the sensor... using Lightroom, I generally find it's better to underexpose a little the interiors and "push" them in raw development ("Fill Light").

Anyway... one has always to expect some problem with such kind of light situations... lens and f stop are not the main factors.

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Normal issue in indoors pics with windows taken directly... a too wide EV range for the sensor... using Lightroom, I generally find it's better to underexpose a little the interiors and "push" them in raw development ("Fill Light").

Anyway... one has always to expect some problem with such kind of light situations... lens and f stop are not the main factors.

 

Thanks for the replies. I wasn't concerned with the overexposure of the windows, it was the ghost image of the.windows in the lower right that I was wondering about. Someone on rangefinderforum.com pointed me to an article showing this as a result of my UV/IR cut filter. Now I know. Wish the M8 didn't require these filters...

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... Wish the M8 didn't require these filters...

True. Leica trained us for years to avoid filters and then suddenly came up with a camera that requires them. Ugly moment. :confused:

 

But in a case like this, you might be able to get away without the UV/IR-Cut filter. Possibly worth a try next time.

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Thanks for the replies. I wasn't concerned with the overexposure of the windows, it was the ghost image of the.windows in the lower right that I was wondering about. Someone on rangefinderforum.com pointed me to an article showing this as a result of my UV/IR cut filter. Now I know. Wish the M8 didn't require these filters...

 

Sorry... I did not notice the ghosting at first sight...thought you were concerned of the color fringings in the windows' frame (which is typical next to "burned" areas) ;yes ghosting is surely related to UV IR filter reflections... in the forum you can find some examples of this...typical situation is pictures in darkness with street lamps in the frame, that cause "bright spots" somewhere...:( nothing to do aprt removing the filter...

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All who replied here except mckeough_k are wrong. The ghosting has nothing to do with reflections off the sensor or the UV/IR-cut filter. It would occur without filter and on film also.

 

Areas of light that are very bright in relation to the rest of the frame always create ghost images that are located 180° from the original area—a point reflection with the frame's center as the center of the inversion. This will happen with or without filters, on film and on digital sensors. The brightness of the ghost can vary; in some cases it's too dim to be noticed, in others it's very obvious. There is nothing you can do about it short of not taking the shot at all. In some cases you can place the offending light source at the frame's center; then its ghost will fall on itself where it won't be objectionable.

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the likely suspect...but you can get this from any lens, with or without filter

This phenomenon is typical for a reflection off a planar surface, such as a filter. Now while there are some lenses with planar or nearly planar surfaces, too, the filter is the most likely culprit by far. If you get this issue with a filter on the lens, the chances are excellent that it will just vanish when you repeat the shot without the filter.

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Guest mc_k
This phenomenon is typical for a reflection off a planar surface, such as a filter. Now while there are some lenses with planar or nearly planar surfaces, too, the filter is the most likely culprit by far. If you get this issue with a filter on the lens, the chances are excellent that it will just vanish when you repeat the shot without the filter.

 

Well, the same effect is also typical of curved surfaces, acting like a curved mirror to the original reflection. Look through the back of a lens pointed at a lamp, without a filter, and you will more than likely see an extra copy. (Well actually don't, for safety's sake.)

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Guest mc_k

and it's worth pointing out, if the window was a small lamp farther back, you might have some lovely little circles instead...so the same effect is not always a negative.

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