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Forum: Pentax SLR Lens Discussion 8 Hours Ago  
Debating the HD FA 43mm - thoughts?
Posted By mlag
Replies: 11
Views: 285
What you can do here Advanced Search - Pentax User Photo Gallery and search for 43mm... (never did it before, so I had to look for it myself).

For me the attraction sits in the combination of compact size and image quality which made me buy this one... and the presence of an aperture ring. The other one drawing my attention was the more versatile 20-40mm but bigger and DA lens without aperture ring which put it on my waiting whish list...
Forum: Pentax SLR Lens Discussion 1 Day Ago  
Teleconverters aren't always horrible...
Posted By mlag
Replies: 30
Views: 1,059
Pics are visible now...
Forum: Pentax SLR Lens Discussion 3 Days Ago  
Turning K-3/3 into street camera :)
Posted By mlag
Replies: 28
Views: 1,186
The trade off is pocket size versus field of view.
Around 40 mm : has always been one of the most compact ’pancake’ lenses in pentax. The 40 xs is today cheapest new lens.
But if streets are narrow one might prefer another wide lens in the 15 to 35 range...
Even the fish-eye 10-17 comes to my mind in the extreme wide end. The fish eye effect however can be a blessing or a curse...
Forum: General Photography 3 Days Ago  
Buying & Selling Camera Gear These Days Is A Two-Edged Sword
Posted By mlag
Replies: 44
Views: 3,094
My perception is that "standard (zoom)" lenses are plenty available and due to low demand cheap...
But specific lenses like primes, F1.x (ultra)wides , long teles >300mm, or tele’s F2.x , tilt&shift, macro...(including pentax * and limited) still have higher prices, and seem to disappear (sell) quite swift. I have also the impression these specific one’s are increasing in price, so some sellers seem to focus on these and know the increased demand & prices...

Some other threads on this forum indicated that the market of (new) DSLRs is shifting to more high-end-enthusiasts and pro’s, so the secondhand market might follow ?
And that consumer grade market is spoiled by automated cameras and therefore less interested in old Manual lenses...?
Forum: General Talk 5 Days Ago  
Your latest acquisition
Posted By mlag
Replies: 25,514
Views: 1,929,188
High nord solar panels are often mounted almost verticaly, even wall mounted, tilted only 10°-15° up to face better the low sun in winter & also to keep them free of snow. Yield is low (compared to the equator there is less sun) but always better than nothing, especially in desolate area’s where electricity is more expensive.

And they are low maintenance, compared to a windgenerator in stormy, icy circumstances....or a diesel gen set.


If his roof is steep enough , rather 60° vertical than 20° flat , it might still be acceptable... I guess the choice for tiles is also a matter of aesthetics and space for installation.
Forum: Troubleshooting and Beginner Help 5 Days Ago  
why apsc lenses are best for apsc cameras
Posted By mlag
Replies: 44
Views: 1,779
I disagree on the wording here, focus is same (focal length! ) and difuse would mean unsharp...
I think you can look at it like this: an apsc lens can be created from a FF lens by cutting away an outer rim of the lenses, the outer 1/2 (just guessing) cm of the diameter is not needed. The sensor sits on the same place as the FF one, but is smaller and hence diameter can be smaller.
A good FF lens will be good on both sensors.
But we know sharpness into the corners is sometimes a problem on cheaper lenses and complex zoom lenses...
Hence an apsc usage of a FF lens might suffer less from corner unsharpness or vignetting, as it doesn't use the FF corners.


Making larger diameter lens glass is more difficult than smaller diameters. They will be also thicker in the center or edge of the glas (think about the 2 typical shapes of a lens https://www.kindpng.com/imgv/TRomixm_convex-and-concave-lenses-concave-lens-convex-lens/ ) and thicker/larger lenses are more difficult to produce...
Here the smaller size difference might benefit apsc designs: they are easier to produce because using smaller and thinner lenses. Hence an purposely designed apsc lens design is more compact...as we all see on our apsc lenses (DA series)

Given a certain skillset of designer and poducer of lenses, there is bit more margin, degrees of freedom he can exploit and invest in image quality, hence an apsc lens might be perceived better as FF if build with same production skills or tools. Or he can just produce cheaper for same quality exploiting the size production-advantage.... Hence I would not always assume apsc is always a better lens design, it might be just a cheaper design...

Unfortunately a smaller sensor is more difficult to produce for the same image quality... Otherwise we would all use smartphones by now? So the various sensor sizes have justification, but advances in sensor technology allow more and more the smaller sensors... this market shift to smaller sensors and smaller, cheaper lenses is ongoing for some time and existed also in film. The desired quality level is the bottom. Oh, and digital postprocessing, AI or not, is a new factor pushing the limits, it's not only sensor hardware.
Forum: Pentax SLR Lens Discussion 6 Days Ago  
Dumb Question re SMC Pentax Reflex Zoom 400-600mm F8-12.
Posted By mlag
Replies: 9
Views: 487
Mine is also quite reluctant to zoom, you need to apply more than usual force to rotate the ring, unlike any other lens ring. Lucky the focus ring is swifter. On the good side, the zoom doesn't creep if you point up or down, and you won't mess up the zoom while focussing.
But it is not the lens for swift zoom tracking a fast subject.
Forum: Digital Processing, Software, and Printing 6 Days Ago  
How do Pentaxians handle their massive photo library?
Posted By mlag
Replies: 55
Views: 1,948
A main NAS with 3 x 6 terabyte harddisks for storage in Raid (yields 12 Tb effective) with 3x1Gb SSD as cache to improve speed for recent used files. And a similar , bit cheaper NAS as backup without ssd cache capability, holding a weekly base, full backup but also incremental backups - if someone wants to retrieve a older version of a recently mistreated document ....
It is my second generation of NAS, the first 2Tb one did work well for 12 years but became slow for modern pc’s, the newer NAS-protocols are faster, new disks are faster and photo files are getting bigger when new camera sensor megapixels increase!
It survived 2 disk crashes without data loss thanks to Raid config, The older NAS used normal pc disks, less reliable than the newer server/NAS graded types.

It serves as storage server for 6 people-my family. Not only for photo but also for 6xpersonal storage (mail,work/University,contracts, tax records,....whatever) in 7 dedicated spaces (personal disks with access rights).
The photofolder is year---event-or-theme folder/subfolder based. It holds pictures since 1995 (the oldest are scans of film negatives).

Moving photo catalogs to an NAS - PentaxForums.com
Forum: Pentax DSLR Discussion 6 Days Ago  
Continue with Pentax or sell the whole batch?
Posted By mlag
Replies: 53
Views: 2,284
If you liked k200 and mz50 style shooting as you indicate, and have bunch of lenses, it makes sense to continue with a better digital pentax camera body (secondhand can from a few 100’s, like k5, k3, kp or new like k70 or k3III ) and another standard zoom in the 17- 50/70/135 range as you are disappointed in your current one. Sensor technology has jumped forward, so a newer body might improve your experience if you expect ultra sharp pictures.... if you go this path, you like to take control of your camera, your lenses, your settings, your pictures...and accept the larger kit size for the pleasure of full control. Going to another brand is probably just expensive unless you have specific demands ( like video...) or your other lens options are rather limited in value. Selling off equipment: don't expect miracles.

If you want to keep it simple (one smaller body with one fixed zoom lens), lightweight and like simple, automated point and shoot photography, a small compact might be the way forward.
Or a bit more advanced like a travel zoom camera ( typically more zoom range wide to tele covering the lens options) or bridge camera , they have indeed replaced the simpler, old film bodies/lens options of the mz-50 era. Price and size wise these could be the meet in the middle strategy between compact and dslr.
Going this compact ... bridge path is a sign you don’t mind the camera doing some things for you, as there are less control buttons and lens options,... and just focus on standard quality pictures & photography (less on art, landscape, macro, wildlife, sports... or other more complex shooting conditions).

So the question is, how do you see yourself as a photographer? Then choose the way forward...
Forum: Troubleshooting and Beginner Help 6 Days Ago  
Tamron: to buy or not to buy
Posted By mlag
Replies: 24
Views: 884
The issue is indeed future compatibility and service support , any sigma or tamron acquired today (secondhand) might work with today's camera bodies, but not (always) with future bodies, a screwdrive might be less risky than an el. motordrive one...(there might be more evolution in this newer type of focusing) . The sigma 70-210 and K1II is a know example where end of support is clear. Also getting sigma for pentax lenses repaired is reported to become cumbersome (even if the lens mounts still exists for other brands).

In camera corrections (for vignetting, distortions etc...) are only with Pentax lenses.
So a cheap tamron can be a solution now if it is reflected in the price correctly.

The bit more expensive pentax 70-210 is F4 but maybe more future proof...and the much more expensive 70-200 F2.8 is similar better but more expensive....

Choices ...short term / long term money spending...future bodies compatibility...

if sigma and tamron are (much) cheaper , than it is worth for a short term investment.
Forum: Pentax SLR Lens Discussion 08-09-2022, 01:09 PM  
Valuation of lenses
Posted By mlag
Replies: 3
Views: 541
Have you checked the lens review section Pentax Lenses - Pentax Lens Reviews & Lens Database , there are prices for used and new lenses and their evolution over time....
Compare with the ebay's , keh, adorama, mpb, bhp .... used lens sites and the market place on this forum ....


2.12.0.0
Forum: General Photography 08-07-2022, 07:59 AM  
Why you want a Leica ?
Posted By mlag
Replies: 43
Views: 1,797
For the same reason as I don’t drive a Lambo or a RR ...
Forum: Pentax DSLR Discussion 08-07-2022, 07:44 AM  
Pentax K-3 II GPS Data
Posted By mlag
Replies: 11
Views: 563
You have to check your photo viewers, many can show a little map next to the foto, depending on settings.
DCU tool from pentax can show..
Windows photo requires you open the information panel (alt enter in some versions or the ’i’ in menu) and shows photo parameters like aperture and focal length and a map if gps data present in pictures.
Google picasa used to be quite effective for gps data....
Some viewers let you browse photo’s on map to select.
Pic2map is an example...

I use it for mainly two reasons :
Traveling: I admit I usually am able to locate a photo of the Eifel tower ( albeit there are some copies here and there that might confuse ...) but for intercontinental (for me out of Europe) or nature and wildlife traveling my pictures are my guide if I need backtracking my journey... I just need to take sufficient pictures, which isn’t a big burden ... I even admit sometimes to take a picture to have gps coordinates (to remember the Y-split of the trail where we weren't sure which one to take 🤔 )

Wildlife tracking: contributing to waarnemingen.be and obsidentify (app) gathering statically info on habitats of common and less common animals... obsidentify also allows identifying the species if you (think) found something exceptional....

For me, there should be a basic gps tracker in all camera’s (not necessarily an astrotracer with compass and 3axis motion detection) like in even the cheapest smartphone. On my K10D I used a Bluetooth gps tracker and post sync on computer via timestamps, working but cumbersome if you start messing with timezones or summertime on both devices.
So more fan of K3-II than K3-III for this aspect (clumsy via gps imagesync struggle, almost as basic as on my K10D, aah really?).


And let’s face it : my wife's little pocket travel zoom camera and our bridge camera have gps on board, so why not in a new 2000€ DSLR ...?
Forum: General Talk 08-06-2022, 02:42 PM  
Your latest acquisition
Posted By mlag
Replies: 25,514
Views: 1,929,188
4 diaphragms ( a small rubber valve..) for a zodiac pool cleaner shipped from USA - if I buy them in Europe it is almost same price 60 $ for one. Shipping/import is more expensive, hence 4 to optimize. Still gives a 3 to 1 ratio. Crazy.
Unfortunately doesn't work for pentax gear...
Forum: Pentax K-70 08-06-2022, 01:45 PM  
Operating K-70 from PC/python?
Posted By mlag
Replies: 6
Views: 380
Other hacking options besides infrared that might work

The cable release via the micro jack
Pentax CS-310 reviews - Pentax Camera Accessory Review Database is the variant for the k 70.
K-70 might be the odd one (there are 2 types of wired trigger
Pentax CS-205 Wired Remote reviews - Pentax Camera Accessory Review Database )
but this seems easy Motion trigger? - PentaxForums.com

Image sync software ...


There is some commercial sw like pk trigger cord with cmd line...
Forum: Pentax SLR Lens Discussion 08-01-2022, 08:54 AM  
Soligor MF Lenses
Posted By mlag
Replies: 12
Views: 757
Only one Soligor : I did buy one last month to use it on Pentax-k mount monocular convertor: the pentax- k mount based Soligor 70-300mm f3.8-5.6 MC C/D.
see PENTAX Monocular Converter K reviews - Pentax Camera Accessory Review Database

Because it is a single ring focus&zoom, going up to 300mm (210mm is more common in other brands) and was budget friendly...
It works very well as monocular, the point and zoom is very convenient in this setup, image looks good.

On camera K3-II it can produce nice images, but not as sharp as more modern lenses - not good for severe cropping.
The 1:3 macro in 2nd image is also quite ok, but if feels like dof is lacking a bit when compared to other lenses. Bokeh is quite pleasing.

Exif : note that the manual set focal length is 250 mm (as an approximation for the zoom lens), the camera did not get focal length info. images were taken in 200-300mm range.
Forum: Pentax Price Watch 07-31-2022, 10:16 AM  
A* 1200mm f8 on ebay
Posted By mlag
Replies: 2
Views: 440
Hmm, for that price they could have included free worldwide shipping...
I am also wondering what ( and how many ) subjects one can find for a combo 1,4x 1200mm F8 (effective F12) to justify this price and the resulting price per picture.
Forum: Pentax SLR Lens Discussion 07-30-2022, 02:26 PM  
prime, prime, everywhere a prime...
Posted By mlag
Replies: 16,326
Views: 868,068
With 1,4x rear convertor on the 300mm, is it your default config..?
Forum: Photographic Industry and Professionals 07-29-2022, 03:23 PM  
The end of the SLR
Posted By mlag
Replies: 90
Views: 3,261
In the car industry the idea is to streamline production to one or very few hardware variants. Like: it is cheaper to produce all car seats with el, heating, the choice to have heated seats in your car becomes a paid option and an activation , but not a hw variant. With the added advantage you can buy/activate it later or get it for a monthly subscription fee...(which is choice capex-opex for buyer, and a way for producer create a recurring revenue - in current context of shortages in supply chain: there would be revenues without even building new cars during stalled production due to shortages or pandemics....

In electronics, IT, telecoms there is a shift in value chain to software (with updates, new features) away from hardware (generic, cheaper and powerfull enough). Software becomes Subscriptions. Think like Microsoft Office or some postprocessing photo software....
...

So we could imaging having one camera body being sold as fullframe K1markIII, or in cropped mode K3markIV or K70markII, features like HDR or pixelshift by option payment, or get the sw AND upgrades covered by monthly fees (like new added KATEN image profile...?)....
Looks like for the camera it's feasible soon: cropped mode exists, adding features too, they just need to create a subscription model...
Only lenses will stay hardware... I mean you can program an ultra zoom ( like 17-300mm) to behave like a prime or a standard 17-50mmm but the image quality won’t be a prime experience , nor a 17-50 f2.8 fixed caperture low light lens...
Maybe lenses need more time to evolve into Trilobite-Inspired Camera Boasts Huge Depth of Field | News | Communications of the ACM or into this 'Lensless' imaging through advanced machine learning for next generation image sensing solutions .... before it becomes sw features...

The future is bright software subscription and option packs...
Forum: General Photography 07-27-2022, 01:24 PM  
what are canon and Nikon thinking
Posted By mlag
Replies: 55
Views: 2,435
Isn’t there a diopter correction on the view finder on most modern camera’s to avoid this reading glass problem?

As long as you are the single user, or don’t accidentally change it (every auto focussed picture suddenly looks bad in viewfinder) under the rubber eyepiece, it works fine and should see both sharp.
Forum: Travel, Events, and Groups 07-26-2022, 08:54 AM  
First Trip to Europe.
Posted By mlag
Replies: 18
Views: 608
And plenty of sdcards (or backup memory....). If you visit the historical cities of Europe, there will be plenty opportunity to shoot pictures....

I support your choice : a wide and standard zoom, complemented with a prime or two will do the job.
Usually I add a F1.x lens for evenings or indoors in historical buildings, allowing low light pictures without flash (indeed historic buildings with fragile paintings, etc.... forbid flash use)...
Outdoors there will be sufficient light , still long summer days in August...(summer time in Europe favors longer evenings...)
Forum: Pentax Price Watch 07-24-2022, 02:24 PM  
UK/European Pentaxians: Park cameras: K-1ii & 100mm Macro for £1297
Posted By mlag
Replies: 2
Views: 290
Unfortunately Europeans now have to pay import duties , making the UK deals like 20% less attractive. (Varies a bit per country and handler, but my cost is typically fixed 15 € import handling fee and duties 20% of shipped value (including shipping fees!)) 😞.
Forum: General Photography 07-24-2022, 02:08 PM  
Setting IBIS on a manual zoom with SCIENCE!
Posted By mlag
Replies: 7
Views: 732
On a manual 28-200 I would switch my camera on/off quickly and change the focal length to match the next expected scene like wide 30 medium 70 or tele 200... Iwould not be more accurate than these 3 values.
My feeling is that accuracy matters more on the wide end, than on the longer end... hence the 30 70 200

On my pentax 400-600 mm, I set it either on 450 or 600mm, to stay away from values from my other manual tele’s ( a 400, a 500 and 550 (actually a 1,7x300mm)), to keep track of lenses in exif data. As the camera uses steps of 50..., it’s about as accurate as possible to keep track of lens in exif....
Forum: General Talk 07-23-2022, 03:25 PM  
Your latest acquisition
Posted By mlag
Replies: 25,514
Views: 1,929,188
A Sigma 500mm f4,5 EX APO DG arrived last week....to complement my 50-500mm zoom.

First indications: as expected sharper but bigger , so I have now to choose between compactness or sharpness... might get difficult.
Forum: Troubleshooting and Beginner Help 07-23-2022, 12:33 PM  
how to tell if SR is working correctly with a non pentax lens and non pentax TC
Posted By mlag
Replies: 7
Views: 557
As your camera shows F4, it seems both lens and teleconvertor pass aperture / focal length info to camera (hence both lens and tc mounts should have these series of 5 metal balls/ contacts and an aperture pin). If you change the aperture either on lens or camera (use A on lens if possible) it should work for both focal and aperture...
Unfortunately most teleconvertors do not adapt the info of focus length with the 2x or 1,4x factor, they just passthrough, the only exception is pentax own 1,4x hd da aps-c convertor.... so SR will work on normal, unmodified length, not on 1,4x or 2x length. Not optimal, but on long lenses it might still be helpfull, the SR has lower impact on long tele’s and seems less sensitive to the focal length being a 300 or 420 mm... (for the SR these view angles are much more alike , than for instance the difference between 30/40mm view angles...). I would keep the SR on for handheld and off for tripod shoots...
To input yourself the focal length, your camera must believe it is an old fully manual lens, pentax-k or -m style without any info contacts...., hence one can use a dumb ( no contacts at all, or cover them with thin tape) teleconvertor and do everything manual (focus , aperture,...) in green button mode...
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