FS: Pentax Rear Converter-A 2x-S
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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.

One of the best 2x convertors. If it were the 1.4x version I would snap it up but I already have this one.
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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?
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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 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
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Posted 02/02/2019 - 09:58
Price drop to £55 inc P&P
LennyBloke
LennyBloke
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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
Ian
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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
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
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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
Regards
Ian
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Posted 08/07/2019 - 12:45
Bump - forgot I still had this
LennyBloke

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

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


LennyBloke
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Posted 29/05/2020 - 09:33
How about £49 plus P&P for this little beauty

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


UK Only, Bank Transfer, Cheque (cleared), PayPal (Gift), Postal Order or Cash on collection, Inspection Welcome
LennyBloke
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Posted 05/06/2020 - 15:38
Okay - what about £49 including P&P
The last 2 I can see that sold on Ebay were £90 and £78 - this one is at least as good condition. If you're after an A series high quality 2x converter then you won't go far wrong with this one
LennyBloke
The last 2 I can see that sold on Ebay were £90 and £78 - this one is at least as good condition. If you're after an A series high quality 2x converter then you won't go far wrong with this one

LennyBloke
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Posted 06/06/2020 - 00:13
How many of you are using series A lenses? This was made for them and it is a seriously good converter! Put a K to M42 adapter in it and you get the same quality result with Takumars et. al. (I will be claiming commission when he sells this!)
Both the *istDS and the K5 are incurably addicted to old glass
My page on Photocrowd - link

Both the *istDS and the K5 are incurably addicted to old glass
My page on Photocrowd - link
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LennyBloke
Member
Worcestershire
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