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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 : Jay (ibcom@onebox.com)
Url : http://
Date : 11:57 AM Friday 13 August, 2004

AB, Good news indeed. It will be interesting to see if these will be existing FA optical formulas. They certainly are excellent macro formulas, if so. Any of us will welcome Pentax coming into the professional digital SLR fray. The existing 6MP CCD cameras are only good for up to a 9 X 12, in certain capture formats and reproduction realities. This is with inkjet color rendering methods and limits. It is not with "billions of colors," as hyped by the imaging program and scanner bit ratings (of course they fail to tell one that the computer operating systems limit this to millions, not billions, of colors). And Ink Jets limit this further indeed by color dot based renders which are formed of primary colors alone, not variants in primary color hues for rendering. I need to see this at twice the available pixel rating to move from my 14.5MP 645 back, and newer backs now out there (now up to 28MP) to migrate to to the 35mm size camera body. I would welcome such a move from the standpoint of mobility and lens coverage opportunity.

Unless these optics are made in Vietnam, they probably will be more expensive than existing FA optics. Lets hone our antenna and keep one another posted on this. Pentax did tell me a full size chip camera is in development almost eight months ago. --Jay


2. From : AB (handmaid@fsmail.net)
Url : http://
Date : 02:38 PM Thursday 12 August, 2004

See below from Boz's site. Does the aperture ring and 35mm coverage mean that Pentax is planning a 'full frame' pro-ish digital, why else would the new lenses have such coverage? 'According to DPreview, Pentax has announced two new and exiting lenses: smc Pentax-D FA Macro 100mm F2.8 and smc Pentax-D FA Macro 50mm F2.8. Both are part of a new lens series with two very exciting aspects: an aperture ring and coverage for the full 35 mm image circle. It seems that the "DA" series (no aperture ring, APS-sensor coverage) aims at low-budget customers whereas the "D FA" is for the professionals and enthusiasts.' AB


3. From : AB (handmaid@fsmail.net)
Url : http://
Date : 06:58 AM Thursday 12 August, 2004

Ian(2), half a stop is not that much, can you be sure? I would take the camera in for testing, there's nothing like proper test equipment to measure the actual exposures. Someone like the tech I use would probably let you take the camera in by appointment and test it while you're there and then you'd know for sure. AB


4. From : Ian(2) (meeian@aol.com)
Url : http://
Date : 07:00 PM Wednesday 11 August, 2004

I have had a feeling for some time now that my LX is overexposing by about half a stop and have just just done some fairly tests using Kodachrome 64, which I find is much less tolerant to exposure errors that most present day E6 films, and these seem to confirm my suspicions. The simple solution, I guess, is just to adjust the ASA setting on the camera, but I wonder if there is a calibration/adjustment trimpot somewhere under the baseplate. Anyone had experience of this problem and know if my hunch is right? I'm disinclined to remove the baseplate just to find out, but if there is some certainty of an adjustment, then I might give it a whirl. I guess the underlying cause is the mirrors becoming less transparent allowing less light to reach the metering photodiode. This seems to be confirmed by TTL/off the film flash exposures being pretty well spot on. Any views or ideas welcome.

I'd endorse the various comments about the 50/1.7M, a super lens which I used for a long time and regret having disposed of for next to nothing! I still have an early M42 50/1.4 on an ageing ES which I keep for pure nostalgia and that too turns in cracking results. My 50/1.2M makes for extra-easy focussing but I find it a little "soft" wide open. Stopped down below 2.0 or 2.8, you wouldn't know it was such a fast lens - and when you simply have to have the extra speed, who really cares? Rgds Ian(2)


5. From : GLOBETROTTER (globetrotterworld@hotmail.com)
Url : http://globetrotters-quest.com
Date : 05:16 AM Wednesday 11 August, 2004

I would second Jay's advice. The later 50mm Pentax lenses are all superb, and can be bought very cheaply. The ones I've used most are the SMC-M 50mm f/2, SMC-M 50mm f/1.4, SMC-A 50mm f/1.4 and SMC 50mm F/1.2 and SMCA 50mm f/1.2. My favourite is the SMC-A 50mm f/1.2 (mainly for its light-gathering power and ease of manual focus in dull conditions), although all are good, and a 50mm f/1.2, f/1.4, f/1.7, or f/2 would each give extremely sharp photos when stopped down to f/5.6-f/8. On a cost for performance basis, then the SMC 50mm f1.4 or SMC-A 50mm f/1.7 would be hard to beat.


6. From : Jay (ibcom@onebox.com)
Url : http://
Date : 12:17 AM Wednesday 11 August, 2004

Ian, Unless you are strapped for a 50mm, I would not go out of my way for the one cited. It is a fact that the M, A, and F 50mm f 1.7 series are amazing (I must be embarassed to say I hold four here). Sharpest, colorful, used, an under $50 bargain, etc. I use this lens when a WA or portrait is not needed, because I know it shines. Mico also embraces it. Yes, the older 1.8 optical formula does accept what is needed for the faster lenses. But notice that they are not quite up to the 1.7 series. --Jay


7. From : Jay (ibcom@onebox.com)
Url : http://
Date : 12:14 AM Wednesday 11 August, 2004

Ian, Unless you are strapped for a 50mm, I would not go out of my way for the one sited. It is a fact that the M, A, and F 50mm f 1.7 series are amazing (I must be embarassed to say I hold four here). Sharpest, colorful, used, an under $50 bargain, etc.

I use this lens when a WA or portrait is not needed, because I know it shines. Mico also embraces it. Yes, the older 1.8 optical formula does accept what is needed for the faster lenses. But notice that they are not quite up to the 1.7 series. --Jay


8. From : GLOBETROTTER (globetrotterworld@hotmail.com)
Url : http://globetrotterworld.co.uk
Date : 04:24 PM Tuesday 10 August, 2004

Lens SMC 55mm: Performance/ Mechanical/ Price Ratio:

SMC-M55/1.8 Top / Mid+/ Top

Some other old Pentax lens performance tests:


50/1.8 sc 1.8 93 47
4.0 148 93
a bit above average contrast/saturation

55/3.5 macro 3.5-11 117 105
well above average contrast/saturation

50/1.4 ssc 1.4 102 69
2.0 92 78
5.6 124 110
high contrast/saturation

50/1.4 new 1.4-2.0 91 57
4.0+ 114 81
avg-above contrast/saturation

55/1.2 ssc 1.2 68 60
2.0+ 120
5.6+ 107
rather low/lowish constrast/saturation

Some Newer Pentax 50mm manual focus lens tests:

SMC Pentax Manual Focus Lenses
Central Resolution Corner Res. W.O. Cent. Res. Central Contrast
50mm f/1.2 K 64 49 42 60
50mm f/1.4 K 73 58 54 68
50mm f/1.4 M 63 56 63 62
50mm f/1.4 A 68 49 46 68
50mm f/1.7 M 71 51 69 61
50mm f/1.7 A 70 62 51 69
50mm f/2 M 61 46 46 40





9. From : Ian (ian@ity.co.uk)
Url : http://
Date : 11:29 AM Tuesday 10 August, 2004

Whilst chatting to my repair guy (John at PJ's) about a dud lens I bought on eBay (that's another story) he told me about a lens I'd never heard of. It was a recommendation. The Pentax K-Series 55mm f/1.8. Suffice it to say, I looked it up. Most interesting, I see that it has a spherical interface on it's doublet. Technically, this should give better off-axis aberration correction, resulting in better bokeh. This is a design that we normally only see in Pentax's f/1.2 and f/1.4 50's (other companies gave up a long time ago (sixties) presumably due to manufacturing costs). I shall keep my eye open for one. I'm eager to hear any comments on this one. - Ian.


10. From : GLOBETROTTER (globetrotterworld@hotmail.com)
Url : http://globetrotterworld.co.uk
Date : 11:43 PM Monday 09 August, 2004

Just noticed this Pentax LX Exploded Diagrams + Parts List for sale on Ebay, for those who are interested:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=15240&item=3832200570&rd=1


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Maintainers for Pentax LX Series SLR Camera Models Message Board:
Tony Davies-Patrick (Globetrotter) (globetrotterworld@hotmail.com); Mico Smiljanic (micolx@netscape.net);
Jay Hart (ibcom@onebox.com); Philip Ashman (genesisphil@hotmail.com)

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