What is the image quality on photos taken with 35mm lens's with adapters on DSLRs?

I have a canon 1000d and have just bought a tele-converter to play about long distance shots with. I've just been surfing ebay and have found this:

http://www.ebay.co.uk/...0545357737

Does anyone have any comments on using SLR lens's with adapters on DSLRs? Will there be the similar over/under exposure that i get with a tele-converter? How is image quality affected? I understand that adapters have a slight tele-converter effect so will this add on to poor quality long distance shots?

All contributions will be much appreciated.

I have dozens of old manual lenses that I've adapted to my canons, including a couple T-2 mounts. Only certain mounts are successfully adaptable to still retain infinity focus. The most common include:

m42 screw mount,
Pentax K-mount,
Nikon F-mount
Olympus OM mount

The image quality is outstanding on some of the high quality old lenses. For example, I use a Pentax SMC 50mm f1.2 and Pentax SMC Takumar 50mm f1.4 rather than modern Canon 50mm's. Those old lenses are sharper, believe it or not.

Don't worry about light reduction that a teleconverter would do. Adapted lenses that retain infinity focus don't reduce.

The lens you're interested in the link looks like it might be an f4.0 or f5.6 lens, but you can't tell by the pictures alone. Soligor was a 3rd party brand (similar to Sigma's and Tamron's you find today), and not regarded as the greatest image quality, but the build quality of any of those old lenses is very good. Ask the seller what the widest aperture on this lens is. If the minimum aperture is f8.0, I wouldn't buy it at that price. Considering the description says there's whiskering on the rear element, I'd offer £40 for this lens if it's an f5.6.

In conclusion, I have to add that manual lens adaptation isn't for everybody. Digital cams don't have split-screen focus systems, so you need sharp vision and it takes practice to get consistent focus where you want it. It can be very rewarding however, to once again take photos "the old fashioned way". Quite often old lenses have interesting attributes, like swirl bokeh and subtle color shifts and they render images with a character that modern lenses don't seem to have.

For Canon most adapted lenses perform as they are, as most lens systems do not need to be corrected to give infinity focus. This is also good news for the image quality as the adapter won't affect the lens' performance.

That said you do need to be careful what lenses you buy, some of the lenses on offer can be absolute gems (I'm thinking of the Zeiss for Contax/Yashica and Leica R's) others can be pigs. You really need to know what you're doing when buying these lenses, often it helps to be part of a group of people who do this regularly as you can go to them for advice.

Personally I'm quite suspect of this Soligor, the "whiskering" is what worries me, that could be fungus in the lens, which while it doesn't show up, can be deadly for cameras. So buy in person and if you're just starting to explore the capabilities bring someone who has the knowledge.

I would avoid buying on eBay, the prices are far too high, and the sellers are trying to make a quick buck from inexperienced users. Nowadays I only buy when I can see it first, whether this is a camera fair, a charity shop or a car boot sale, it doesn't matter as long as I can check it thoroughly.

If you want some more information have a look at this group: Good luck with your Soligor, whatever you choose to do, and please post up a review.