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04-23-2011, 08:03 AM   #541
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QuoteOriginally posted by rparmar Quote
I seem to recall a Yahoo Group for people who wanted to organise eBay bidding, so that people didn't end up bidding against each other. I remember being a member but I think it is defunct now. It does make sense, but I think buyers come from all over and, in any case, there are far too many members of this forum alone to coordinate anything.
I've never seen a forum expressly for organizing, but in a wine forum on which I post, people do exchange their auction handles. I've had mixed feelings about that, because it could be that if someone whose opinion you trust is bidding on a particular wine, it might invite competing bids.

04-27-2011, 06:03 AM   #542
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congrats

QuoteOriginally posted by genez Quote
Hey Radek

I paid a tad over USD50 for that copy as I've posted the auction pics of which included shipping from Ontario Canada to Singapore.

Eugene
I did notice the lens but i believed that the one I wanted was beter or in better shape (seller refered that yours has a small scratch). But someone is crazy and bid on the lens 102 USD
05-05-2011, 08:13 PM   #543
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Does anyone have a Close Focus version that does focus down to 14cm? If so, can you take pictures of the lens and distance scale?
05-06-2011, 12:39 AM   #544
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QuoteOriginally posted by Eruditass Quote
Does anyone have a Close Focus version that does focus down to 14cm? If so, can you take pictures of the lens and distance scale?
I'm not 100%, but I think all the CF versions can go as close as 3"(8cm) actually.

05-06-2011, 02:55 AM   #545
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I spent the day wandering around downtown with my K20D mounting a mount-modded N/AI Vivitar-Komine CFWA 28/2 that cost me US$18.55 (shipped) on eBay a couple months ago. Great lens! I just now measured -- its close-focus is 17cm / 6.75in. If I want to go closer -- I won't use a 28! I'll drag out the MacTak 50/4 (1:1) which takes me in to 6cm / 2.35in.
05-06-2011, 03:10 AM   #546
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QuoteOriginally posted by JohnBee Quote
I'm not 100%, but I think all the CF versions can go as close as 3"(8cm) actually.
This one goes down to 0.23 metre
Vivitar 28 mm 1:2.0 MC Close Focus Wide Angle No.28310647
05-06-2011, 06:47 AM   #547
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QuoteOriginally posted by Eruditass Quote
Does anyone have a Close Focus version that does focus down to 14cm?
QuoteOriginally posted by JohnBee Quote
I'm not 100%, but I think all the CF versions can go as close as 3"(8cm) actually.
These comments come from confusion about how focal distance is measured. It is not taken from the front of the lens to the subject -- but rather from the focal plane to the subject.

The Close Focus variants generally manage 23cm. This can clearly be seen from the barrel markings, for example in the shot of the K2 where it is also marked as 1:5 reproduction ratio. Given that the distance from focal plane to the front of the lens (sans hood) is about 8.5cm, this gives a working distance of 14.5cm.

I have not found a variant with working distance 8cm.
05-06-2011, 09:04 PM   #548
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Using the diagonal split of a KR-10, the lens does indeed focus at 230 mm from the film plane.
The nose is about 96 mm from the film plane when fully extended (230 -96=134).
I often used this lens for electronic boards etc hand held w/o flash.
But it is a great standard lens, the extended snout is a good hand hold and mechanical smoothness of the rings is probably better than any other lens in my collection..

08-16-2012, 05:50 PM   #549
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How about a 24mm bestiary?

Hi,

I just bought a Vivitar 24mm 2.8, the serial number is 91103xxxx, so if this is correct, it was build in 1991 by Cosina.
It's appearance doesn't match any of the 28s in the bestiary, it does however share the filter thread diameter and the rubber grip on the focus ring with the A22.
Otherwise it resembles the A21 (Cosina!), though I haven't seen the other of the "Two variants with different markings on aperture ring. PK-A/R mount."

It came with the original (unopened!) packaging and paperwork, here are the specs:
Filter thread: 52mm
Min. focus distance: 19cm (1:5 Makro)
19cm to infinity: ca. 165
Opt. construction: 7 lenses in 7 groups, 5 aperture blades
Coating: "Multicoated"
Mount: PK-A/R
Dimensions(xL): 61x40mm

Lens:




Contents of the original packaging:



I have posted a set of test shots with the DA 18-55 WR for comparison at dslr-forum.de (it's in german but I think you'll get the gist):
www.dslr-forum.de/showthread.php?t=1127442

I don't know how it compares with other Vivitar 24s or the K/A/FA*24 but it certainly wipes the floor with the DA 18-55 WR.
It's well worth the 40€ ($50) + shipping I paid for it, anyway...



I've seen several versions of Vivitar 24s so far (including quite a few in this thread), so to me it seems like a good idea to make a bestiary for the 24s as well...
If wants to do that, he/she can use my shots (including those in the Thread at dslr-forum.de) or ask me for the originals / better ones.


Jan

Last edited by Boris_Akunin; 08-24-2012 at 08:42 AM.
08-17-2012, 10:50 AM   #550
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HI Jan -

I had an older version of that lens, I believe, and it was a good performer. Have fun!
08-23-2012, 01:03 PM - 1 Like   #551
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Thanks for that contribution, Boris!

I certainly will not be making any more bestiaries -- I only even read posts here once a month. Am too busy with other more productive things. (And all the idiots got me down.)
01-17-2016, 12:59 PM   #552
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QuoteOriginally posted by georgweb Quote
Hello Robin,
I always want to let the pictures speak off the lens (which I've linked already), but never gear- or purely testpics.

Never a rule without exception, so here goes (and you can use these whenever you like),




The 24 is trickier to get decent pictures out of it, and so finally here's some off this lens also :-)
Flickr: Search geobeo's photostream

All the best,
Georg
nice thread
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