probably hidden file is thumbs.db... is just a system file... nothing bad but normal! sorry... but i'm not sure to have understand your problem... have your antivirus and antispyware updated?

Azraelll... you've an outstanding infrared gallery!!! wow! i'm impressed... i'll find the time to see every image of this! your tips are very important! you're very talented in this kind of art! with my camera focus is impossible with manual because i cannot see anything through the hoya r72... do you know some kind of "transparent" filter to use with a reflex camera? but with the same or near the same result? i've notice another artifact on my infrared picture with eos350d and hoya r72... it's like a light rainbow throught the entire shot... i've not idea if it is caused by wheather or focal lenght... sigh!!!

thanks for your help azraell! it's sad to know that the problem is of my camera and not of objective :(((( yesterday i've try the most large aperture size... the quality is very bad and the circle appears again.... this time on every shot... not just with sun behind me... was a cloudy day... a very bad day... the autofocus doesn't work and the manual is impossible... my objective has no sign of infinite and i cannot see through the infrared filter... sigh!!! what kind of filter have you used on the past? except your hand-made (i'm waitin' for the next polarizing again....)

Attached Link: http://www.dpchallenge.com/forum.php?action=read&FORUM_THREAD_ID=255450

sad to see so many circle... but i'm happy for this! i've thought to a terrible problem of my camera or incopatibility of camera+filter... if you find some adjustment let me know :) 1/10 seconds... this is terrible!!! you're lucky!!!

i know that is not a polarizing... polarizing is a tread of some days ago :) my bad english!!! i'm interested to make very long exposure shots during day... the nd8 that hoya give is not enought!

it's hard! i've choosed for the light grey case... hope that my objective couldn't see it! the best is the black box with 2 filter attach and very thin... but it's very much expensive! thanks for your help!

maybe the black pakage contains the best cpl? 7 layers? may all this layers make the time of exposure more long? i'm very confused... i've bought another cpl some time ago... and create shots with a warm tones... i desire to dark the sky and keep the same colours...

glad to see new entries on this tread! :) welcome between us Madeleine!

people... i'm sorry but i've to make you wait... my shots aren't with me at the moment... but your loose nothing :)

this is a wonderful discussion!!! i'm gonna searchin' for shots of mine now :)

thanks! i've buy a circular polarizing now :) thanks for the hints! i'm waitin' for the delivery now!

yes... i've read something about neutral density filter... but i cannot find any shop that sell that... :(

I agree with all said above.... For first, please forgive my bad english... For second .... my photographic story is shortly wroted on my homepage... ive bought a little camera just for fun some years ago... last year a olympus c740... 3megapixel, a 3cm macro range and a 10x tele... ive bought some macro and close up lens... In that period ive try to make some different shots... not the same tourists like (friend in that city, friend in that place, me at the lake... etc)... for learnin is enough a little equipment... if youre satisfied and your passion say you what to do, realize your dreams, life is short and a new cam can make you very happy... Btw the most important thing is the EYE! Ive bought a new money box... maybe ill wait a lot, but i want to learn much possible and desire my new camera (at the moment a eos350d... but im searchin again) so the satisfaction when ill buy it, will be very big. beautiful discussion! May