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Adapting a digital camera to a reflex one Answered

¡Hola! I´ve mounted an obsolete digital camera (Digmax of Famsung, 4 Mp)in the rear part of an old reflex and in this process, I lost the IR filter. The image in the LCD is fine and infrared ligth is not visible, but when I take a picture, then you can appreciate the effect. Why does it happen? I think that IR effect must be visible always, not only in the picture. I´m sorry very much for my bad english. I´m spanish ant it is not easy for me to communicate in this language. Other question: Is there IR filters for the reflex camera? I am thinking to buy one to adapt it to reflex´s lenses and not put it in the digital objetive. Thanks in advance


Hola, que tal? Sus ingles esta el mejor de mi espanol. "Dos cervezas, por favor," y "Donde esta el bano?" Pero yo puedo ayudar...en ingles.

The light sensor in the digital camera is sensitive to IR. Normally they have a filter inside the camera to block the IR effect you see. Here is a link to another Instructable that shows you the filter. If you still have your pieces, you might find the filter again, disassemble your cameras, and see if you can reinstall it.

There are IR filters for reflex camera, but they don't do what you need for a digital camera. The film camera filter looks clear and seems to have no effect at all on a film photograph. We use IR filters mostly to protect the real lens from fingerprints and dust. Then if the filter gets scratched, we replace it.

@ dchall8:
Are you perhaps thinking of UV filters ("skylight")? They are often used to protect lenses from scratching, etc. They do have an effect (with film, anyway), and will tend to somewhat darken cloudy skies. They are also helpful when using flash on white garments that have been washed in detergents that make "whites" somewhat florescent.

Silver emulsions are quite sensitive to UV light--in fact, they don't react beyond the "blue" end of the spectrum without the addition of dyes that extend that sensitivity.

@ benismael:
That's very cool. You might try something like Edmund Scientific for a filter that blocks IR. Most IR filter attachments are for blocking visible light, and passing IR.

You cannot compare the wavelength sensitivity of a CCD device to what you see--they are two very different things...

I was thinking of a UV filter. Sorry. benismael, I have never been to Spain but we have disposable cameras here. We buy the camera for $5, take pictures, and return the camera to a pharmacy where the camera is disassembled and the pictured printed. If you have the same thing you might be able to get one (or more) of the broken cameras, disassemble the lens, and find the IR filter. Or if you can get an old web cam...any old digital camera will have the IR filter you need. Mis dos hijas hablan espanol perfectamente. En la escuela, para los anos uno a cinco de que todo lo aprendido en espanol. No se habla Ingles. Ahora leen los libros in espanol. Esta es la razon por yo hablo un poco de espanol. Por favor no preguntame preguntas de las camaras. Cerveza y banos solamente.

Muchas gracias por responderme en mi idioma. Es agradable y te expresas muy bien. Haces bien en haber aprendido a pedir cerveza y a pregunrtar por el baño, porque en España hay un bar, una taberna, o un restaurante cada cincuenta metros. Da un saludo cariñoso a tus hijas de mi parte y si tienes problemas con este texto, pídelas ayuda. There is not problem to get a IR filter. I have two old webcam, but now I am tired.In a few days I will continue with the theme. And you count. Un abrazo para tí y tu familia. Juan

dchall8 and gmoon: Thank you very much for yours replies, but I think that I was not able to express correctly what I want to say. IR filter is lost (dchall8: I can not retrieve it because surely it is in the dustbin)and I assumed that pictures will be affected by infrared light because I know that IR sensitivity for a CCD is not the same that for the silver emulsions, but I was surprised because before to take the pictures,when you are moving the camera to get the best angle, focusing, etc, the images in the LCD were fines, without infrared effects, but when they were downloaded to PC, they are affected. In the other words: What I saw in the LCD, was not what I saw when the picture was take. To put other IR filter is not very difficult because removing lenses in the reflex, it is easy to get access to the CCD. More easy is to put a filter in the optical ( 52 mm of diameter) but you are saying me that there is not in the market place. dchall8: congratulatios for your spanish. See yours Juan ( John in english)