Help a newb out (filters) [Archive] - Canon Digital Photography Forums

COKE CAN

5th of March 2005 (Sat), 16:29

I am a newb to photography. I just ordered a lens/filter kit. Is it better to have the filter on the outside of the lens, or under the lens on top of the adapter? I am using an A95 currently and hope to move up to a G6 before moving on to an SLR. The filters sit under the lens currently. What are you guys thoughts?

Also, can some one shoot me in the right direction to understand aperature (sp?)?

Steve

PhotosGuy

5th of March 2005 (Sat), 18:45

A filter under the lens won't protect it, but I wouldn't expect that it would make any difference in the quality of the pic.
Virtual Interactive Camera: The Flash-based Virtual Camera gives users hands-on experience operating an Single Lens Reflex (SLR) camera.
Four tutorials explain focusing, aperture, shutter speed and exposure.
http://www.camerasinteractive.com/index.php

COKE CAN

6th of March 2005 (Sun), 09:36

Thank you, sir.

etaf

6th of March 2005 (Sun), 10:18

http://www.morguefile.com/archive/classroom.php
http://209.196.177.41/

COKE CAN

6th of March 2005 (Sun), 11:30

Thank you etaf.

Jon

7th of March 2005 (Mon), 14:19

Putting the filter between the main and auxiliary lenses will change the lens spacing, which will change the optics of the combination. You may not get the same magnification (by some small amount) as the manufacturer claims, or your camera may have difficulty focussing properly, or there may be some distortion due to the displacement. Better, if possible, to keep the lens light path like it was designed to work.

PhotosGuy

7th of March 2005 (Mon), 18:16

Putting the filter between the main and auxiliary lenses will change the lens spacing,... So it's not supposed to go there? He said "The filters sit under the lens currently.", & some lenses are made to work that way (Catadioptric & view lenses). If that is an "auxiliary lens" that you have, I have to agree with Jon. Sorry, I wasn't thinking.

COKE CAN

7th of March 2005 (Mon), 18:53

So it's not supposed to go there? He said "The filters sit under the lens currently.", & some lenses are made to work that way (Catadioptric & view lenses). If that is an "auxiliary lens" that you have, I have to agree with Jon. Sorry, I wasn't thinking.

How would I know what kind of lens I have?

PhotosGuy

7th of March 2005 (Mon), 19:04

How would I know what kind of lens I have? If it's a lens that goes on over the lens that's already on the cam, then it's an "auxiliary lens".

COKE CAN

7th of March 2005 (Mon), 22:51

If it's a lens that goes on over the lens that's already on the cam, then it's an "auxiliary lens".
Yes, it's a Canon A95. So I guess I should just ditch the lenses and get the lenses for the outside?

PhotosGuy

8th of March 2005 (Tue), 06:45

...get the lenses for the outside? Not sure what you mean by that, & I'm not familiar with the A95.

Jon

8th of March 2005 (Tue), 08:48

Yes, you should try to get filters that go in front of the auxiliary lens so it'll work "as designed". If you think that what you're doing now gives you results you're satisfied with (sharp, in focus, and as wide/long as you want) though, you can continue as you are now doing. But take a critical look at your results before deciding to stay put.

COKE CAN

8th of March 2005 (Tue), 09:36

Not sure what you mean by that, & I'm not familiar with the A95.

Sorry, I meant filters on the outside. Canon Powershot A95, a 5MP point and shoot. I'm using a lens adapter and attacheable lenses.

COKE CAN

8th of March 2005 (Tue), 09:38

Yes, you should try to get filters that go in front of the auxiliary lens so it'll work "as designed". If you think that what you're doing now gives you results you're satisfied with (sharp, in focus, and as wide/long as you want) though, you can continue as you are now doing. But take a critical look at your results before deciding to stay put.
Will do. Thanks guys.

PhotosGuy

8th of March 2005 (Tue), 09:46

Yes, you should try to get filters that go in front of the auxiliary lens so it'll work "as designed". If you think that what you're doing now gives you results you're satisfied with (sharp, in focus, and as wide/long as you want) though, you can continue as you are now doing. But take a critical look at your results before deciding to stay put.
Good advice. You'll probably get the best (resolution) results with the lens stopped down about 2-3 stops. The prime lens should always give better results without the adaptor, but only you can decide if the results are good enough for your purposes.