UV Filter Causes under exposure

[qing02051981]

I had a Hoya UV 72mm filter on my Nikon 18-200mm.

I notice that for all my photos when viewed on my PC, they are under exposed by a bit and I have to auto adjust the brightness of the photos. Is this caused by UV filters?

[Leong23]

Don't think that UV will caused underexposed.

You might want to look at the histogram of your shot to confirm it's under-exposed. The might be you PC screen is not calibrated that show a darker image.

[blackdrakes]

are the pictures underexposed in your camera's viewfinder?
how lond did you set your shutter?
most of the time, UV photography requires long shutter speeds.

[blackandwhite]

Originally Posted by blackdrakes are the pictures underexposed in your camera's viewfinder? how lond did you set your shutter? most of the time, UV photography requires long shutter speeds.

are you referring to the camera's LCD instead of viewfinder?

[flipfreak]

Originally Posted by blackdrakes are the pictures underexposed in your camera's viewfinder? how lond did you set your shutter? most of the time, UV photography requires long shutter speeds.

i think u are referring to IR and not UV photography right?

[catchlights]

Originally Posted by qing02051981 I had a Hoya UV 72mm filter on my Nikon 18-200mm. I notice that for all my photos when viewed on my PC, they are under exposed by a bit and I have to auto adjust the brightness of the photos. Is this caused by UV filters?

no, UV filter will not cause your images underexposed, since UV has filter factor of 1 ( 0 stops).

anyway, if you are using TTL metering, camera meter will compensate the filter factor for the filter you use. Unless you are using handheld (extender) meter, than you need to compensate filter factor in your final exposure.

[theRBK]

very simple... shoot with and without the filter and see if there is any difference...

but Nikon is known to be conservative in exposure... I set my camera to permanently increase exposure by 1/2 a stop... it works for me but might be too much for others...

[blackdrakes]

ooohh..
so sorry. see wrong.

[qing02051981]

Originally Posted by blackdrakes are the pictures underexposed in your camera's viewfinder? how lond did you set your shutter? most of the time, UV photography requires long shutter speeds.

No. In the viewfinder, it is ok.

[blackdrakes]

Originally Posted by qing02051981 No. In the viewfinder, it is ok.

erm, i meant IR photography.
i got mixed up.
however, i suggest that you shoot with the filter out and see if there is a difference as commented by theRBK .

[microcosm]

Originally Posted by blackdrakes are the pictures underexposed in your camera's viewfinder? how lond did you set your shutter? most of the time, UV photography requires long shutter speeds.

IR you mean?

[blackdrakes]

Originally Posted by microcosm IR you mean?

yeah IR.

[Kirika]

IR? Read the FAQ in the IR/UV sub forum and then post a question if the stickies don't satisfy you =p Remember that for IR you may need very long exposures. On my Olympus E510, they're typically over 1 sec. I hear some Canon cameras need like 10+ secs or so.

[blackdrakes]

Originally Posted by Kirika IR? Read the FAQ in the IR/UV sub forum and then post a question if the stickies don't satisfy you =p Remember that for IR you may need very long exposures. On my Olympus E510, they're typically over 1 sec. I hear some Canon cameras need like 10+ secs or so.

i cannot even get hold of the hoya R72 52mm.
so i cannot try it out.

[catchlights]

since when TS (qing02051981) talking about IR photography??

TS please confirm you are asking questions about normal color photography or IR photography.

Did you have the answers to your question now??

[waileong]

Originally Posted by qing02051981 I had a Hoya UV 72mm filter on my Nikon 18-200mm. I notice that for all my photos when viewed on my PC, they are under exposed by a bit and I have to auto adjust the brightness of the photos. Is this caused by UV filters?

No. More likely caused by your camera meter. SLR's will meter with whatever filter is on the lens.

[outofmind]

Originally Posted by blackdrakes i cannot even get hold of the hoya R72 52mm. so i cannot try it out.

I cant get it too...
is it out of stock?
sorry to hijack the thread

[qing02051981]

Originally Posted by catchlights since when TS (qing02051981) talking about IR photography?? TS please confirm you are asking questions about normal color photography or IR photography. Did you have the answers to your question now??

Guys. I am talking about normal photography. I am using Hoya Ultra Violet Filter

[qing02051981]

Originally Posted by waileong No. More likely caused by your camera meter. SLR's will meter with whatever filter is on the lens.

Since the camera metered whatever lens is used, can i say the filter causes under expose since it affects the camera meter?

[Scaglietti]

Originally Posted by qing02051981 Since the camera metered whatever lens is used, can i say the filter causes under expose since it affects the camera meter?

Nope. If the lens/filter let in less light, the metering will compensate to achieve optimal exposure by increasing the apperture or reducing the shutter speed. UV filter should not affect the metering.

BC