The Kobori 28-200/3.5 is a much better lens for this particular range

What do you mean under it.

As Vivitar is just brand name, so it can be exactly same lens.

@DrDave

In fact, if you look at first page, serial begins with 77, and it is first two digits that show manufacturer, not three.

So, I still do not understand remark.

I'm sure you are right, that it is the first two digits, I just happen to have two that start with triple 777 for some reason. What I mean by my comment is that I have tested quite a few of these legacy zooms, and I have found the Koburi to have better color and sharpness, for lenses that cover a similar range. None of them is as sharp as something like a Leicasonic, but they have a big range and are cheap.

I haven't shot any real footage with it yet, but I find the Tamron Adaptall 80-210mm f/3.8-4 a fabulous performer in the bargain basement range when shooting stills. I've compared it to a 70-210mm 19AH SP Adaptall-2 in some not-very-controlled comparison tests on my Pentax k100d Super for stills, and it performs quite admirably in comparison- and it's so much lighter and easier handling.

Used it in some closeup work on a quick and dirty test when first got my hands on a gh2, and footage matched up very nicely with that shot with a Pentax M 50mm f/1.4.

I've seen it in the $10-$35 range depending on condition/seller: Mine came in a job lot with some other fantastic lenses for 80 bucks, so I'd have to say I paid ~$25.00, but it wasn't why I grabbed the job lot, believe me! (Pentax K 55mm f/1.8 and M 35mm f/2.8 were the big attraction).

Details here: http://www.adaptall-2.org/lenses/103A.html

Canon FD lenses are indeed very famous in this moment.
But one of the very best FD's is not popular at all.... it's real hidden gem: the 50mm f/3.5 Macro!

I own set of 14 FD primes in all focal lengths between 17mm and 200mm. I don't know if I am just lucky to own especially good copy this lens, but it kind of outperforms almost all other FDs I have. I find it just indispensable.

Nobody wants 50mm f/3.5 lenses today, so one can buy it for next to nothing, if just a bit lucky. Straight from maximal aperture onwards great IQ: no flare, no ghosting, no CA, razor sharp all over, good colors rendition. Its optical elements are as small as Panny 20mm/1.7's
This is the one:

I wonder why nobody has mentioned the KMZ TAIR 11A 2.8/135mm (M42) yet. 20 Aperture Blades: can you spell BOKEHHHH ! ;) Rare to get one in very good condition, needs a good tripod but absolutly beautiful in terms of IQ/color rendition and the creamiest bokeh of all russian glass.

Still looking for a good one myself, only had the chance to borrow it from a friend of mine till now (he got a rare one with a leading zero in the serial no. ) :(

@apefos yes, I have it, it is correct behavior, as FD 20mm f/2.8 just isn't top class lens. It is just good, nothing exceptional. It is not a gem and it is also not hidden :-)

I've got a Soligor 35-70mm f2.5~3.5, declicked w/ 8 aperture blades, and does macro pretty well.

Does anybody know if Soligor 28-200 3.5-5.3 (no.99...) is the same construction as Vivitar/Kobori? Thanks!

Just bought a Vivitar 28-200 (777) on eBay with M42 mount; can anyone recommend a suitable Micro 4/3 adapter? Cheers. Agree with the comments about the 25mm and 75mm Cosmicar lenses - great lenses for the price, even if the 25mm looks ridiculous on an AF101!

@TheLoneRoger
Just check eBay. It's full of the adapters. I've ordered often directly from Hong Kong for just a few $ and they were all really well-done.

Thanks. I've ordered one on eBay that looks to be the same as the Bigis one - I think a lot of these Chinese parts are the same but branded under many different names - certainly if they're anything like Chinese motorcycle parts, they are! The Cosmicar 75mm I've got is f1.9 - see below. The one in the picture above is a Pentax branded 25mm, which is f1.4