SMC Pentax-F 1.7X AF Adapter with case : Excellent Condition


Algernon

Link Posted 28/02/2017 - 11:51
SMC Pentax-F 1.7X AF Adapter

I no longer use this rare and unusual adapter, so due to it's rarity I'm offering it for sale to someone who is looking to give one a good home.

Virtually unused in Excellent condition, almost Mint apart from some very tiny marks (almost invisible) on the bayonet where it has been attached to camera and lens. The bayonet is in excellent condition. Even the pass sticker is intact and mint.

The internally focusing elements work perfectly.

Acts as a TC and also converts Pentax KA and K manual lenses to autofocus. Retains all exposure modes supported by the attached lens.

Can be used with Autofocus lenses, in which case the Adapter takes over the focus duties.

Complete with case and both original end caps. No box.

Focal length is not transmitted and has to be entered manually after multiplying by 1.7x.

Manual:
http://c758710.r10.cf2.rackcdn.com/files/support/manual/275_1314744958-112672920...

UK ONLY PRICE INCLUDING NEXT DAY RMSD 210










Edit: Seems to be a blue cast on the case. It should be black. Sorry.
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Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 28/02/2017 - 11:55

smc

Link Posted 28/02/2017 - 11:55
Algernon, does the TC work with the K1 and A lenses?

Algernon

Link Posted 28/02/2017 - 12:24
I've only got a K-5, but it's a FF Adapter and I used to use it with a Pentax-A*300mm f/4 on different bodies without any problems. The ebay price of these has shot up in Japan etc. (300 - 380) so I would assume that's because of people wanting them for a K-1.

I've also used it with the DA*300mm f/4 on a K-5 without any problems. I've now got the HD DA 1.4X that I use instead. The 300mm needs stopping down to f/5.6 with that to get the best results. The 1.7x was good at f/4. There's very little difference in performance with all the top TC's they are very close to the maximum possible resolution. See .....
http://www.traumflieger.de/objektivtest/open_test/telekonverter/overview.php

You sometimes have to set the focus manually in the vicinity of the subject for best results.

Edit: I forgot to mention Payment by Paypal gift or Bank Transfer preferred.
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Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 28/02/2017 - 12:28

JAK

Link Posted 28/02/2017 - 13:18
smc wrote:
Algernon, does the TC work with the K1 and A lenses?

Sorry, I'm not he, but yes it does. You still need to enter the updated focal length (1.7X)
John K

pschlute

Link Posted 28/02/2017 - 13:18
smc wrote:
Algernon, does the TC work with the K1 and A lenses?

I can confirm that mine works fine with the K1. Hope this helps.
Peter



My Flickr page

JAK

Link Posted 28/02/2017 - 13:23
Snap
John K

Algernon

Link Posted 02/03/2017 - 11:40
I've been asked by PM to post some sample pics.

These two OOC JPG 100% crops were taken by screen grabs of a comparison between the 1.4x HD TC and the 1.7x Adapter.

DA*300mm f/4 WIDE OPEN lens on K-5 100ISO Flash at f/5.6 and f/6.3. No PP applied.

The 1.7x Adapter transmits the aperture correctly to the camera. The image is about 20% bigger. The 300mm needs manually focusing to approx. the correct position before the shot.

With setups of 420mm and 510mm it's difficult to get shots that are in focus and without shake. From these results, especially taking into account the extra focal length (510mm) provided by the 1.7x I would say that it's slightly sharper than the 1.4x HD. Perhaps I should keep it

EDIT: Sorry the forum software has reduced these from 1024 pixels wide. They aren't as good as the originals.

Try clicking these.....





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Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 02/03/2017 - 12:02

Helpful

Algernon

Link Posted 03/03/2017 - 11:51
Not a lot of people know this.........

If you use this Adapter with a 50mm f/1.7 or f/1.4 MF lens you have a very good 85mm f/2.8 AF Portrait lens How much do they cost?

The AF with a 50mm is quite fast and with the lens set to INF it covers the full range without needing to manual focus at all.

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Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 03/03/2017 - 11:54

Algernon

Link Posted 05/03/2017 - 14:28
Originally this was a UK only sale...... but, because the item is small and I can also insure it I'll would be happy to post it also to Europe for the same price 210. Signed for delivery. Paypal payment as a gift

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Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

Snappyhoffy

Link Posted 05/03/2017 - 23:19
Would it be possible to see the comparison with the 300 with and without the adapter?
'Life looks simple through a viewfinder'.....then I went Digital!
Keith
K3, DA* 16-50, DA* 50-135, DA* 300, AF360

Algernon

Link Posted 06/03/2017 - 08:28
Snappyhoffy wrote:
Would it be possible to see the comparison with the 300 with and without the adapter?

The loss is so little that you can't see it. That's true of most Top TC's. It's measurable in a lab, but probably less than 5%

I could use the case off this so if anyone wants it without the case I'll knock 10 off.

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Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

Algernon

Link Posted 10/03/2017 - 14:09
Reduced to 179 inc. postage as above to UK or Europe.

Take 10 off if you don't want the case.

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Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

takuman

Link Posted 10/03/2017 - 14:46
Don't know if my message was sent as it is not showing in my sent box. I am interested in buying. John
Just passing thru

Algernon

Link Posted 10/03/2017 - 15:13
takuman wrote:
Don't know if my message was sent as it is not showing in my sent box. I am interested in buying. John

Hi John, your message has been received. I'm just about to reply.

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Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

Algernon

Link Posted 10/03/2017 - 18:53
Sold to takuman. Many Thanks for the quick transaction.

--
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
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