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Modern Classic SLRs Series :
Pentax LX - Message Board/Guestbook

Industry wide indications and ceasing film body development by Pentax altogether in early 2003 more than suggest the manual focus Pentax LX will not be having an upgrade (except, perhaps for very rare Limited Edition Models hand assembled by special commission by the new HoyaPentax Corporation). In 2008 Pentax became a division of Hoya Corporation, which had together with Pentax released jointly developed professional grade optics (since 2005); Pentax has shifted its attention to development of auto focus Digital SLRs having build qualities constructed for the long run--now with weather seals--like the LX. You may use this site for common support and sharing of mutual users knowledge or experiences among yourselves. You may also use this message board as a guestbook for the advanced users Pentax SLR cameras from the LX forward, including many such auto focus film cameras, and Pentax digital SLR cameras. We keep the site going too for the WORD SEARCH FEATURE found here as to its magnificent K mount system user archives: as have been shared here for many years. Have an inquiry related to Pentax gear? First try KEYING IN YOUR KEY WORD(S) for a preexisting archived response on your subject of inquiry from this LX site. If your inquiry or sharing is from advanced users K10D, K20D, or K200D SLR needs, proceed on to t NEW PENTAX ADVANCED USERS K10D, K20D SLR site.

This LX site was specifically created for the great Pentax LX SLR camera model(s), and now has incorporated increased opportunity for an expanded interchange with the introductions of the Pentax K10D, K20D, and K200D SLRs to include advanced and professional digital user models. Interchange is encouraged with the intention to continue as a forum for advanced system users of past K-mount film based SLR systems and the mentioned Pentax DSLRs. With decreasing forum traffic here, and enthusiasts moving on with SLR digital imaging products futures, we hope the continued convenience of this site and its past Pentax advanced LX users data archives--provided by the database KEY WORD SEARCH FEATURE found here--can be very useful to you. Most past site user techniques, systems components, and lenses of Pentax advanced applications--as have been past examined by users on this site--are still of use regarding the newest Pentax SLRs. Please don't mail us with other than constructive suggestions or to rectify mistakes found within this site, thank you. Since this is a non-profitable resource site, maintained by professional and advanced system users, the developer of this site reserves the rights to censor or delete any inappropriate, unrelated, misleading or excessively hostile messages posted herein. If your intention is to dispose of your Pentax cameras or its accompanying accessories and/or you are looking for a used model, or even for any of its system components: please use a separate section with a higher volume of related traffic for these purposes: on the
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1. From : Phil Ashman (
Url : http://
Date : 03:44 PM Saturday 04 October, 2003

It's me again guys
Hope I'm not becoming a nuisance, please tell me if I am, it's just that I'm really enjoying the feedback from this forum.

I have another question which is intruiging me:

Is the meter in the LX stepless when firing the shutter?

I know that the led readout is set at standard shutter speeds as oppose to the old style needle going up and down on my last camera (Chinon ce2 memotron - it was quite good actually for a cheap camera!)but i've been looking closely again at my test prints.
As you will recall I took one set of shots with the 400 and converter with the camera on auto and another set calculated with my hand held meter on manual selecting the shutter speeds myself.
What I have noticed is that actually the auto ones are better when it comes to sharpness etc.. than the ones on manual speeds?(not much but noticeable)
I can only assume that the ones on auto have fired the shutter at exactly the right speed (stepless) whereas the manual ones have had to be set at the nearest speed available after adjusting for 1 stop from the handheld meter reading.
If thats correct then I will only use manual when the lighting conditions are outside the scope of the LX meter.
Any comments would be welcome.


2. From : Phil Ashman (
Url : http://
Date : 02:10 PM Saturday 04 October, 2003

Thanks Jay - a lot to take in there!
How do you guys know so much? I just take my pictures almost unaware of what is going on technically!
If I understand you correctly, you would not buy the 1.7 pentax for mainly the 2 following reasons.
1) loss of light making the 5.6 difficult to use.
2) Inability to ever use autofocus.
I have considered this and as I would only be using it with the manual focus sigma 400 in very bright conditions, on a tripod with a cable release and normally motionless subjects plus have no intentions, in the forseeable future, to ever need autofocus, then it does actually still appeal to me.
All I am really bothered about is that the LX (meter etc.) with the sigma 400 and pentax 1.7 would work OK together.
What do you think? Or do you know of any, still available, manual focus converters at 1.7 or 2x that are very good and comaptible with my set up.

3. From : Jay (
Url : http://
Date : 01:15 PM Saturday 04 October, 2003

Phil, below @X convertor should read 2X convertor. --Jay

4. From : Jay Hart (
Url : http://
Date : 01:09 PM Saturday 04 October, 2003

Ian, Congrats, and good shooting.
Phil, You are a live wire. It seems you are embracing the LX while exploring many great possibilities. The Pentax 1.7X AF convertor was made for the first Pentax AF camera, the SF1 (the SF cameras were the first autofocus series Pentax Cameras). To be fully compatable as designed a lens the lens needs to be manual focus, hopefully A series (or M or K), with an aperture of f 2.8 or larger ( 2, 1.7, 1.4, etc.). It was made to keep the manual focus lens holders who had a fast lens arsenal happy enough to buy a then new Pentax autofocus body. These lenses, set on infinity, were then "focused" by the camera and the teleconvertor as the autofocus unit for them. It costs 1.5 stops of light. A 2x costs two stops of light. A 1.4X one stop of light. It would work on other autofocus lenses but not with all functions (they would become manual focus lenses with it, and few are so wide in aperture as what it is designed for, as this is when the shift to zooms for everyman was underway).
I would not buy it, because it cannot be used with autofocus lenses on an autofocus body, other than manually.
You may have a case to return the Sigma convertor, if all the paperwork is still with it, in its box, as you understood it would be "fully compatable" with the 400 F 5.6. Not just manually compatable. I do not know if the Pro 300 series Kenko 1.4 X is fully compatable, or is like the Sigma. I would certainly take in my two Sigma lenses mentioned by you on the forum, and try them out in a shop with it first. If not so autofocus compatable you may as well get a Pentax 1.4xS convertor. Some forum members may disagree, for the Kenko is probably sharper, and probably is as good as the Pentax 1.4X L convertor (very expensive and strictly manual focus, though the A contacts carry over, the F contact and autofocus spinner clutch mechanism does not).
Further, the 1.7X AF convertor would be difficult to focus through with a slower lens, due to light pass-through loss, previously mentioned. A 1.4X is more appealing, losing only one stop. An f4 lens then becomes a 5.6, a 5.6 an f 8. It would cost you another 1/2 stop. I would only purchase a @X pro series convertor for an f 2.8 or larger aperture lens, as then it would be fully compatable (the wide aperture giving enough light to the AF camera sensors to work properly. Probably your convertor does not maintain AF compatablity on such a medium aperture lens, as the 5.6., which becomes an f 8.
Then the AF sensors in a camera body will not respond properly and work the AF properly).
I hope this has been helpful. Globetrotter has said that the Kenkno 300 Pro white series are the same as Tamron. I have read different articles that maintain some difference, FYI.

5. From : Ian (
Url : http://
Date : 08:39 AM Saturday 04 October, 2003

Yeeehaaa Yahoooo! I've gone and bought one! Two bodies to look at, picked the best one (and the FA-1 finder). A little beaten-up, but it passed all Mico's tests. Even a box and manual, and more importantly a body finder cap. It's had a LOT of use and is an early MK I (5 277). I'm trying not to fall in love with it until I've pumped a roll of film. I might be tempted to go back and get the FC-1 finder too (£40). Keeping my fingers crossed on the film test. BTW, congrats on globetrotter sorting the pub deal, go treat yourself to an LX.

6. From : Phil Ashman (
Url : http://
Date : 03:59 AM Saturday 04 October, 2003

Me again!

I've got an opportunity to buy a near mint pentax 1.7 converter PAF fit.
Any views on this with regards to compatability/quality etc..
I've looked at images taken with it fitted on a manual 500mm pentax and they were pretty good.


7. From : Phil Ashman (
Url : http://
Date : 02:40 AM Saturday 04 October, 2003

More info :

Read the manual again on the sigma 1.4ex and it clearly lists the Sigma 400 apo telemacro (mine) as can be used but only manual focus.
It does however go on to say that 'If using (that lens) with a Pentax AF, be aware that that the lens cannot be used with an SF series camera '
I assume the LX is not an SF series camera?

Any thoughts

8. From : Phil Ashman (
Url : http://
Date : 01:52 AM Saturday 04 October, 2003

Hi Globetrotter

The Sigma I have is the 400mm 5.6 APO Macro(now discontinued). Would the Kenco pro 1.4 be better with it than my sigma ex 1.4?
I did ask Sigma before I bought it and they assured me it was compatible. Still will wait to see what their factory in Japan say! If not fully compatible i'm sure my dealer will give me a refund as i'm a regular customer.
I'm getting worried again now with Mico supporting Jay that the 1hr print film I ran off may have simply been corrected in the processing. Still can't understand that if the meter was not working properly and sort of stuck at more or less one speed whatever aperture, then how come I could easily tell the different speeds firing off as I closed down the aperture?


Url : http://
Date : 07:23 PM Friday 03 October, 2003

Whoops! - sorry for the mistake (it's been a long and tiring week of flights and travel!) - the book is actually called: GLOBETROTTER'S QUEST (Globetrotter's World is the heading normally used in one of my regular magazine features).

Url : http://
Date : 07:19 PM Friday 03 October, 2003

Some of you may already know that the publishers of my new book recently informed me that they were 'going-down' - taking my book with them (for the second time in four years I might add!). Luckily, I was quickly offered a number of different publishing options, and decided that a large publishing company on mainland Europe would be the best lead to take. Following a flight to Amsterdam and a wirlwind 2-days in Holland, I secured a wonderful new publishing deal for the book "Globetrotter's World". - So, I'm now as happy as a bee in long as they don't start shaking the jar again!

Phil - regarding the Sigma 400. Which Sigma is it? - The manual Sigma 400mm APO, the AF Sigma 400mm APO, or the Sigma 400mm APO Macro? The 1.4 EX converters were made for the latest EX range of large aperture zoom lenses and not the earlier models, although the actual EX glass should match OK with the earlier 400 models - but possibly with the odd 'metering' read-out connection problems. The earlier Sigma 1.4 converters should fit the 105 macro OK.
The Kenko 1.4 Pro converter can be bought quite cheaply from USA-based shop websites. The Kenko Pro (white barrel) series of converters are also often sold new, and at very low prices from a Hong Kong dealer on Ebay.
Please note that the earlier Kenko conveters (black barrel) are not of such a high quality optics when compared to the latest AF 'white' Pro series.
The very same Kenko Pro converters are also sold under the Tamron trade name.

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Jay Hart (; Philip Ashman (

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