Using protective filters of RF lenses

oscroft said:
Why should the kind of sensor make any difference? A projected image is a projected image, whatever it is projected on. I've certainly seen ghost images from long before digital cameras were invented, and I even remember owning a Pentax ghostless filter (made from curved glass) back in the seventies.
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Because the light reflects off the snesor, onto the filter and onto the sensor back again. That kind of reflections don't happen with film.

Ghosting is not the same.
 
Because the light reflects off the snesor, onto the filter and onto the sensor back again. That kind of reflections don't happen with film.
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Oh, I see what you mean.

Ghosting is not the same.
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As it was ghost images I was talking about, could you explain the difference?
 
Ghosting is somekind of veil over the image and/or an unusually soft glow in the highlight zones. I'm not sure I explained it well. That usually happens with lenses that have bad coatings or in extreme light situations with no hood on the lens to protect it from stray lights.
 
i never used a filter on my Ultron because with one it would vignet more than it already did with the round hood.
now that I have a summicron I would rather protect that front element and so a uv is permanently on and has been since it was new in 98. Not a mark on the lens, never cleaned, and the filter isn't cheap glass either. if it's got Leica stamped on it, it never is!
plus with the square hood and the design of attachment it doesnt vignet.......much
 
Ghosting is somekind of veil over the image and/or an unusually soft glow in the highlight zones. I'm not sure I explained it well. That usually happens with lenses that have bad coatings or in extreme light situations with no hood on the lens to protect it from stray lights
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Interesting, thanks. I don't think that's what the Pentax ghostless filters were about though, because I remember them stating that the curvature of the filter was to prevent back-reflection.
 
I have several vintage lenses with the soft coatings and flint glass used during those times. I prefer to keep those from getting scratched up.
 
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