Kenko L40C filter?

I just got my first 35mm film camera. It's an Olympus Pen FT and it came with a second lens, a Zuiko E 150mm and on this lense is a Keno L40C filter, but I'm not sure what the effects will be with this thing on here. It's also got another filter, a Vivitar Skylight a1. I was easily able to google this second one, but not sure what the first does, or what the effect will be with both of them on there. That's just how the lens came, so I'm a bit confused.

Any help would be appreciated.

Thanks

Welcome to the forum .
IIRC the L40C is a standard UV filter , the Skylight one does the same job but slightly warming things up .
You would use one or the other , not both at the same time , with colour film to cut through haze on landscape shots etc .
Sea and Mountain areas in particular benefit from their use ( unless you want to capture the hazey view on film ) .
A UV cut filter can sometimes give a harsher , bluer image which is why some people prefer the skylight filter .

If your using black and white film , there of less use .
In an area with a lot of haze like mountains , a yellow filter will do a better job .

Some people also leave them on to protect the front lens element from dirt and splashes etc .
Generally it's best to not have a filter on the lens unless needed as it's one less piece of glass to affect image quality .
Quality of the filters also make a difference , some are better than others , and some are absolute junk and can ruin your shots .

Ah, I gotcha. Well thanks for the reply. I'll be taking one of these off now. I havn't gotten a chance to shoot any film yet, and I wasn't too keen on experimenting.

If you have an Ektachrome slide or two, put them on a lightbox and try the two filters one at a time.
With slide you're looking at an original transparency, not second gen print that has two processing steps
to get to a positive. With B&W there won't be any color effect so use either one.

What about these? They screw onto the Konica lens, but they just make the viewfinder blurry.

LambentTyto said:

What about these? They screw onto the Konica lens, but they just make the viewfinder blurry.

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They are close-up filters to permit you to focus closer to the subject than normal.

Jim Jones said:

They are close-up filters to permit you to focus closer to the subject than normal.

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Also they will definitely cause some loss of image quality. especially if they are "stacked," using two or three together. Best use a tripod, cable release, and stop down to mid-apertures, f5.6 or f8, for example. If you get into closeup or near-macro shooting, watch for extension tubes or a macro lens.