FS: Pentax Rear Converter-A 2x-S


LennyBloke

Link Posted 27/10/2018 - 13:31
I have hardly used this excellent condition copy of the A series Rear Converter-A 2x-S - you probably know all about it if you're reading this but if you don't it's worth noting a few things - This manual converter retains all exposure modes supported by the attached lens but does not relay information about focal length, MTF, or lens name to the camera. It is is designed for lenses 300mm and shorter, but can be used with longer lenses but It is not compatible with the FA 28-90mm F3.5-5.6, the K and A 15mm F3.5, the M 24-35 F3.5 zoom and various other wide angle lenses due to the protruding rear elements of these lenses.

It comes with Pentax body and rear cover caps and the original hard case which itself is in very good condition. One of the highest quality converters of its day, beautifully made, and with the coatings in very good condition - this isn't quite collectors state but not far off.













Price: 69 inc P&P

UK Only, Bank Transfer, Cheque (cleared), PayPal (Gift), Postal Order or Cash on collection, Inspection Welcome.

LennyBloke

davidwozhere

Link Posted 27/10/2018 - 18:34
This is really a top hole converter. Wouldn't part with mine.
Both the *istDS and the K5 are incurably addicted to old glass

My page on Photocrowd - link

Kim C

Link Posted 28/10/2018 - 01:21
Not sure why anyone would want to use it with wide lenses like the 15mm or the 24-35.
One of the best 2x convertors. If it were the 1.4x version I would snap it up but I already have this one.

RobL

Link Posted 28/10/2018 - 07:40
I have a mint condition Vivitar 2x (this is not a sales plug) but have stopped using it because I have found without it and cropping to the equivalent area gets me better results. How does this Pentax one compare on a digital body?

LennyBloke

Link Posted 28/10/2018 - 19:11
RobL wrote:
I have a mint condition Vivitar 2x (this is not a sales plug) but have stopped using it because I have found without it and cropping to the equivalent area gets me better results. How does this Pentax one compare on a digital body?

I've tried a lot of converters and generally speaking those from the manual focus era having 7 elements were the better ones, this was always one of the best but a few years back they were a lot more expensive. I don't have any photos to prove how good this one is (or not) but if I get a chance I'll do some test shots and post them.

If IQ is the main aim then a high end 1.4x will be a better choice, but you are doubling the focal length of your lens with a 2x so you should expect some degradation. I haven't found any converter that works well when used at maximum aperture of the lens - but stopping down 1 stop with a quality converter makes a notable difference.

I don't think that little ramble has actually answered any questions but never mind
LennyBloke

LennyBloke

Link Posted 02/02/2019 - 09:58
Price drop to 55 inc P&P
LennyBloke

ISP123

Link Posted 03/02/2019 - 16:47
I am a complete novice when it comes to teleconvertors, so bearing that in mind how do you think it would perform on my Tamron 70-200.

Ian

LennyBloke

Link Posted 03/02/2019 - 19:54
ISP123 wrote:
I am a complete novice when it comes to teleconvertors, so bearing that in mind how do you think it would perform on my Tamron 70-200.

Ian

Hi Ian - To be totally honest I wouldn't recommend many converters with zoom lenses - I'd stick to primes with this one. The only TC and Zoom combination I use is the DA*60-250 and DA-1.4x - most others are disappointing in my opinion (I'm sure there are other excellent combinations thoigh).
LennyBloke

ISP123

Link Posted 03/02/2019 - 20:42
Hi Lenny, thank you very much for your honesty in your reply, as I said all new to me and was a shot in the dark as I am finding it very difficult to source a longer lens at a price in my range. So thanks again for the advice.

Regards

Ian

LennyBloke

Link Posted 08/07/2019 - 12:45
Bump - forgot I still had this
LennyBloke

LennyBloke

Link Posted 05/10/2019 - 09:49
And another bump
LennyBloke

LennyBloke

Link Posted 19/10/2019 - 15:31
Another bump - again, this is a superb condition item - both optically and cosmetically
LennyBloke
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