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Forum: Non-Pentax Cameras: Canon, Nikon, etc. 09-18-2021, 08:06 PM  
102 years old camera with a surprise!
Posted By Spock
Replies: 43
Views: 1,916
Very cool. I'm guessing the plastic film spool isn't from 1918? ;)
Forum: Post Your Photos! 09-17-2021, 01:20 AM  
Night calling Astrophotographers - is this Saturn?
Posted By Spock
Replies: 7
Views: 289
I would suggest trying a much shorter exposure to avoid Saturn looking like a bright light - a fast shutter speed will also negate the need for a tripod. Basically your image should look completely black until you zoom in.

Here's my recent attempt at Saturn with a K3 Mk3 and a 34 year old F*300mm lens, handheld. The image is straight out of the camera, with no post processing, but heavily cropped.
1/750sec, F4.5, ISO 800



And here is Jupiter: Handheld with K3 Mk3 @ f4.5, 1/750s, ISO 200. Image again heavily cropped. Jupiter is currently the second brightest planet in the sky after Venus.



By the way, by my reckoning, on a APC sensor, a 300mm lens gives a magnification of 9x. About the same as a pair of binoculars.
Forum: Pentax SLR Lens Discussion 09-14-2021, 04:11 AM  
Teleconverters - Pentax v Kenko v Tamron
Posted By Spock
Replies: 18
Views: 1,077
In my opinion and experience (I've owned F-1.7AF , A-1.4, and DA-1.4 rear converters), teleconverters were useful with film and with early DSLRs but now with pixel-dense cameras like the K3 and later cameras you get better results cropping the images taken with just the lens than with the lens+converter.
Perhaps with stopped down apertures, teleconverters may give better results than cropping, but I usually use long lenses wide open or close to wide open.
Forum: Pentax K-1 & K-1 II 09-13-2021, 06:49 PM  
Question for people to who use both classic lenses *and* more modern AF lenses
Posted By Spock
Replies: 30
Views: 1,838
I too have the A70-210F4 and it is an excellent lens. Out of curiosity, some years ago I tested it at 200 against a DA*200 F2.8 and FA*80-200 F2.8 and it didn't suffer by comparison, producing punchy, colourful and sharp images with good bokeh.

On the other hand, a newer but still old lens, the F80-200 F4.7-5.6 lacks contrast and sharpness compared to the aforementioned lenses but it's light weight and small size means it often has a place in my bag when I think I might need a longer lens on an outing.
Forum: Pentax K-1 & K-1 II 09-11-2021, 07:55 PM  
Question for people to who use both classic lenses *and* more modern AF lenses
Posted By Spock
Replies: 30
Views: 1,838
Vintage lenses can render beautiful images with a charm and character that may be missing in modern computer designed leases.
Sure, they flare more, often don't have sharp edges, and chromatic aberration and other flaws may be visible when 'pixel peeping' - but images don't have to be perfect to be interesting.

These were taken with a K10D and 1973 Takumar 85mm screw mount lens:


F1.8, 1/60s


100% crop:


F2.8, 1/50s


100% crop


F2.8, 1/50s
Forum: Pentax SLR Lens Discussion 09-11-2021, 07:37 PM  
How Not To Test A Power Zoom Lens
Posted By Spock
Replies: 20
Views: 1,132
I wasn't thinking of reintroducing the features to new lenses (although that would be nice in a perfect world) but simply enabling the current Pentax DSLR cameras to use those functions. Surely writing a bit of software wouldn't be that hard or expensive.
I'd love to be able to use the image size tracking and zoom clip auto zoom features on my FA*28-70 and FA*80-200 lenses (which are certainly not mediocre!).
Forum: Pentax SLR Lens Discussion 09-11-2021, 08:43 AM  
How Not To Test A Power Zoom Lens
Posted By Spock
Replies: 20
Views: 1,132
It's a real shame the full suite of power zoom functions aren't available on Pentax DSLRs. The image size tracking and zoom clip functions are still impressive and would be useful today.
Forum: Pentax SLR Lens Discussion 09-11-2021, 01:45 AM  
DA*200 review
Posted By Spock
Replies: 31
Views: 1,911
I had a DA*200 and I agree it does have some purple fringing - so to point that out is okay. I sold mine when I got an FA*80-200 after comparing them back to back. Since then I also managed to obtain a F*300 - and in my opinion both lenses perform better optically than the DA*200 - but I certainly don't think it deserves a '1' rating. I'd give it an 8. (I'd give the FA* 9, and the F* 10).
Forum: Lens Clubs 09-08-2021, 08:01 PM  
300mm plus Lens Club: discuss your long lenses
Posted By Spock
Replies: 37,126
Views: 3,899,489
I had a Q7 and a genuine K to Q adapter. Unfortunately I found it was VERY hard to get good focus with long lenses and the results were actually not as good as cropped images taken with the same lens on a K3 (Mark1) I had then. The Q screen is low resolution and it's often hard to even see what you're taking a picture of at high magnifications - especially in low light.
Forum: Lens Clubs 09-07-2021, 07:57 AM  
300mm plus Lens Club: discuss your long lenses
Posted By Spock
Replies: 37,126
Views: 3,899,489
It was a clear sky tonight so I gave Saturn a go. I didn't think it would be possible but with a K3 Mk3 and a 34 year old F*300mm lens I'm amazed to have got this image - and handheld! The image is straight out of the camera, with no post processing, but heavily cropped.
1/750sec, F4.5, ISO 800

Forum: Pentax Film SLR Discussion 09-06-2021, 02:27 AM  
PZ1p / Z1p quick reference card
Posted By Spock
Replies: 16
Views: 814
Good to know. I bought a manual from ebay and am waiting for it to arrive. Hopefully the card is still in it!
Forum: Digital Processing, Software, and Printing 08-25-2021, 02:41 AM  
Poll: What Pentax image tone do you typically use in camera and/or post processing?
Posted By Spock
Replies: 29
Views: 2,492
I like the look of 'reversal film' for some photos.
Forum: Lens Clubs 08-24-2021, 05:57 AM  
300mm plus Lens Club: discuss your long lenses
Posted By Spock
Replies: 37,126
Views: 3,899,489
Thanks. Your pics of Jupiter and Saturn are truly amazing though. I will have to learn that stacking trickery!
I assume Saturn is more difficult to photograph than Jupiter?
Forum: Lens Clubs 08-23-2021, 08:39 AM  
300mm plus Lens Club: discuss your long lenses
Posted By Spock
Replies: 37,126
Views: 3,899,489
Jupiter tonight through my F*300 f4.5. Handheld with K3 Mk3 @ f4.5, 1/750s, ISO 200. Image is heavily cropped and rotated to get Jupiter the 'right way up' (apart from a slight jaunty angle. ;) )

Forum: General Photography 08-20-2021, 02:08 AM  
Your travel setup
Posted By Spock
Replies: 27
Views: 1,026
If travelling light: KP with DA20-40 and the very light and compact F80-200 f4.7-5.6 in case I need more reach. I make sure I pack my old ultrapod mini tripod for self timer pics.
If I can carry a bit more, I'll also add my A35-105 f3.5 because it's such a versatile, as well as fun lens to use.

If travelling VERY light: I'll take my Q7 and standard 5-15 zoom (24-70 equivalent). If I think I'll need them, adding the wide angle and telephoto zooms doesn't add much weight.

If I'm shooting film, I'll take my Super-A and (if travelling light) the tiny (same size as a 50mm) A35-70 f3.5-4.5.
If I don't think weight is going to be an issue, I'll fit my A28-135 f4 - a very versatile and underrated lens.
Forum: Photographic Industry and Professionals 08-17-2021, 03:57 AM  
Auto-focus | A Historical Surprise
Posted By Spock
Replies: 13
Views: 662
Ricoh also used the K mount.
Forum: Photographic Industry and Professionals 08-16-2021, 06:47 PM  
Auto-focus | A Historical Surprise
Posted By Spock
Replies: 13
Views: 662
As it has the same green hexagon and red arrow focus aids as the Pentax ME-F, which came out in 1981, I'd say it is very likely Ricoh had a licence agreement with Pentax.

https://en.m.wikipedia.org/wiki/Pentax_ME_F
Forum: Post Your Photos! 08-09-2021, 08:49 PM  
Machinery Jack's Hack - A B-29 Stratofortress
Posted By Spock
Replies: 18
Views: 544
I'm late to the party, but here's an interesting video showing the B29's remote control gun turrets.















Youtu.be



Forum: Pentax SLR Lens Discussion 08-08-2021, 08:23 AM  
How Not To Test A Power Zoom Lens
Posted By Spock
Replies: 20
Views: 1,132
Only power zoom works on (some) DSLRs. What a shame the other functions aren't enabled. The auto zoom functions were ahead of their time and would be still pretty cool to use today.
Forum: Pentax SLR Lens Discussion 08-08-2021, 12:01 AM  
DA 55-300 PLM & 1.4 converter
Posted By Spock
Replies: 13
Views: 692
Using the HD DA1.4 converter with a F*300 lens, my conclusion was I had better image quality without the converter and cropping to the same field of view. Consequently I sold my converter.
Forum: Pentax SLR Lens Discussion 08-07-2021, 11:43 PM  
How Not To Test A Power Zoom Lens
Posted By Spock
Replies: 20
Views: 1,132
I'm pretty sure power zoom worked on my K10.
Forum: Pentax SLR Lens Discussion 08-07-2021, 07:21 PM  
DA 55-300 PLM & 1.4 converter
Posted By Spock
Replies: 13
Views: 692
I'm not sure I understand your question but with the converter it looks like a 'longer' lens was used than in the photo taken without the converter.
Forum: Pentax Film SLR Discussion 08-07-2021, 07:16 PM  
Pentax ESII shutter closes when I release the shutter button - is this normal?
Posted By Spock
Replies: 12
Views: 624
Thanks. I think I'll take the conservative approach and just hold the shutter button until the camera has completed its exposure. My feeling is these old cameras are fragile and opening them up may cause other problems!
Forum: Pentax SLR Lens Discussion 08-07-2021, 08:28 AM  
Is the absence of a modern FF TC an admission that quality suffers?
Posted By Spock
Replies: 30
Views: 1,594
Here's one that's closer in price to the K3-III @$2899.95 :

Pentax K1 MKII Body | Ted's Cameras
Forum: Pentax SLR Lens Discussion 08-07-2021, 02:30 AM  
Is the absence of a modern FF TC an admission that quality suffers?
Posted By Spock
Replies: 30
Views: 1,594
But the K3-III is more expensive than the K1!
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