"Non digital" lenses with digital SLRs

  Severn Bore 20:18 18 Dec 04
Locked

Hi
It is possible to use ordinary Canon EF lenses with their range of digital SLRs, subject to a change in focal range.
However, can anyone please say how the picture quality using lenses from ordinary film cameras compares with dedicated digital lenses?

  ton 20:32 18 Dec 04

Try looking on this site click here

  woodchip 20:33 18 Dec 04

A lense as you know is only like a pair of glasses Digital or Analog does not make any difference. You can but try one to see if it works. If it fit's the front it's got to have some affect

  Wilham 21:53 18 Dec 04

I suggest the confusion arises because digital cameras now come with optical zoom, and this has been achieved by using one or two aspherical (=non-spherical) lens components.

Historically zoom lenses were developed for cine film cameras, these optical devices were very expensive and heavy.

A single aspherical lens can replace several of the many spherical lenses that work together in a zoom lens. This has happened in all digital zoom cameras. It reduces size and weight, and the zoom facility apparently outweighs the slight losses in optical performance. Look up 'aspherical lens' in Google.

  Dorsai 21:56 18 Dec 04

IF it fits, it must be worth trying. But from what little i have picked up, the CCD in a digital camera is not normally the same size as a frame of 35mm film, but smaller.

A 35mm SLR lens unit is designed to focus the image on a frame of 35mm film.

While the lens unit of a SLR digicam is designed to focus the image on a smaller CCD.

As long as the focal distance (the distance between the back of the lens unit and the surface the image is projected on) for both lenses is the same, the image should be in focus on the CCD instead of the film.

So as you say, you may well find that the Digicam piccy is only the central part of the image the lens captures, giving a different focal length.

As for image quality, at the moment film cameras are ahead of digicams in terms of image quality/detail capture, so i would *expect* the film lenses to do a better job, but have no idea what difference using, in effect, the 'wrong lens' for a camera has. But if you already have the lenses, there is no harm in trying.

but it would be interesting to find out.

  Charence 22:07 18 Dec 04

Thus the 18 - 55 mm F3.5 - F5.6 lens provides a field of view equivalent to a 28.8 - 88 mm lens on a 35 mm film camera.

For more info click here

Charence

  Sir Radfordin 22:57 18 Dec 04

I was once told that traditional SLR lenses didn't always refract (or whatever it is they do!) at the same angle as digital lenses. This leads to lower quality pictures. Not being a camera whiz can't offer any more on that theory...sorry!

  TECHNODIMWIT 07:47 19 Dec 04

yuo cant fit the digital lens onto a traditional camera, as the mirror jams on the rear of the lens,
now how do you get the wife to agree to buying a EOS300D

  MIke 08:53 19 Dec 04

Have you checked Canon's vsite for the EOS 300D? It states
Canon?s extensive lineup of over 50 EF lenses, ranging from ultra wide-angle to super telephoto, is fully compatible with the EOS 300D. Through advanced optical know-how and micron precision engineering, they deliver unprecedented performance that facilitates artistic expression and maximizes the potential of the EOS 300D.

  MIke 08:54 19 Dec 04

forgot the link click here

  golfpro 09:05 19 Dec 04

You can use any EF lens with the 300D, but you can't use the dedicated Digital EF lens with a Canon EOS film camera.
If you want a lot more info on this and other camera subjects I can't do better than this site. click here

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