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Forum: Pentax SLR Lens Discussion
02-25-2024, 02:35 PM
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These sort of magnifications imply fairly significant distances to the subject, at which point atmospheric distortion can start to be a factor, especially over water ... I'm wondering if that's the distortions you're seeing?
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Forum: Pentax SLR Lens Discussion
02-25-2024, 06:23 AM
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On 24Mp aps-c with TC you have 24Mp and 945mm equivalent FF focal length (1,4TCx1,5cropsensor x450mm).
On K-1 in crop mode you have ~16Mp and also 945mm equivalent.
Without crop mode you can probably increase to 20..24Mp without vignetting by manual crop in post, but you stay with 630mm, maybe bit more focal equivalent due to crop... hence less magnification, even when pushed to 24Mp.
One could add ISO sensitivity in the discussion (because of F8 and fast shutter need for wildlife...) but this depends on individual camera’s in the comparison..., I guess a K-3m3 would excel here compared to older generation bodies.
PS: K-3II with 1,4x HD DA and 150-450 gives excellent results, there is only light loss of sharpness and focus remains reliable,
one exception on the rule that TC’s result in general in visible picture quality reduction.... this combo feels like being build to work together.
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Forum: Pentax SLR Lens Discussion
02-25-2024, 08:37 AM
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On 24Mp aps-c with TC you have 24Mp and 945mm equivalent FF focal length (1,4TCx1,5cropsensor x450mm).
On K-1 in crop mode you have ~16Mp same focal length.
Without camera crop mode you can probably increase to 20..24Mp without vignetting by manual crop in post, but you stay then with 700mm....800mm equivalent.. hence less magnification, even when pushed to 24Mp.
One could add ISO sensitivity in the discussion (because of F8 and fast shutter need for wildlife...) but this depends on individual camera’s in the comparison..., I guess a K-3m3 would excel here compared to older generation bodies.
PS: K-3II with 1,4x HD DA and 150-450 gives excellent results, there is only light loss of sharpness and focus remains reliable,
one exception on the rule that TC’s result in general in visible picture quality reduction.... this combo feels like being build to work together.
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Forum: Pentax K-3 III
05-10-2021, 04:58 AM
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Yes, c.a.m. explained that previously. But the manual could be clearer. The OVF section doesn't mention the word "tracking" until the third page, and even then doesn't tie it to any specific AF Active Area.
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Forum: Pentax K-3 III
06-22-2023, 10:24 PM
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You Tube
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src="https://www.youtube.com/embed/-MYCxa-btlY?controls=1" allowfullscreen>
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Forum: Post Your Photos!
06-13-2023, 07:07 AM
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Dear friends,
I made it to LE MANS 24 HOURS !
That was a dream come true, that was THE GOAL when I started shooting and thinking where would I like to end up one day. (even thought I love Formula 1)
This event runs for a week, and I just missed 2-4 days (I went Wednesday and was there until Sunday when the race ends).
By what I've heard it's been an EPIC race,
I came from Barcelona by plane and then rented a car. The previous weekend I was covering the Formula 1 Spanish Grand Prix 2023 what allowed me to do one more F1 race (at home), let's say a "Last Dance", photographers edition. And Saturday I was sick. Sunday and Monday I even had fever. But painkillers helped me get better. Now I can say i'm recovered 95% but not in Le Mans.
It was my first time there and it's not easy, this is a 13Kms track, and you need to walk quite a lot.
But I won't complaint.
Race Day (24h race) was hectic and I think I just slept 2hs in my car at the parking lot from 2 to 4AM saturday to sunday.
I have used the following gear Pentax K3-III y K3 Silver + Sigma 17-50mm, Pentax 21mm limited, Pentax 35mm DA, Pentax 50-135mm f2.8 y el Pentax 150-450mm :D
Here some pics I like and I hope you too do (those are images from the 5 days but specially from the Race itself)
 IMGP5954 by Daniel Gonzalez Aguilera, en Flickr
 IMGP5969 by Daniel Gonzalez Aguilera, en Flickr
 IMGP4816 by Daniel Gonzalez Aguilera, en Flickr
 _IMG5086 by Daniel Gonzalez Aguilera, en Flickr
 IMGP0231 by Daniel Gonzalez Aguilera, en Flickr
 _IMG6139 by Daniel Gonzalez Aguilera, en Flickr
 IMGP0217 by Daniel Gonzalez Aguilera, en Flickr
 IMGP3019 by Daniel Gonzalez Aguilera, en Flickr
 IMGP1909 by Daniel Gonzalez Aguilera, en Flickr
 IMGP2606 by Daniel Gonzalez Aguilera, en Flickr
 IMGP3439 by Daniel Gonzalez Aguilera, en Flickr
 IMGP3853 by Daniel Gonzalez Aguilera, en Flickr
 IMGP3632 by Daniel Gonzalez Aguilera, en Flickr
 IMGP3931 by Daniel Gonzalez Aguilera, en Flickr
 IMGP3922 by Daniel Gonzalez Aguilera, en Flickr
 IMGP3933 by Daniel Gonzalez Aguilera, en Flickr
 IMGP4662 by Daniel Gonzalez Aguilera, en Flickr
 IMGP4228 by Daniel Gonzalez Aguilera, en Flickr
 IMGP4596 by Daniel Gonzalez Aguilera, en Flickr
 IMGP7018 by Daniel Gonzalez Aguilera, en Flickr
 IMGP7068 by Daniel Gonzalez Aguilera, en Flickr
 IMGP7216 by Daniel Gonzalez Aguilera, en Flickr
 IMGP7873 by Daniel Gonzalez Aguilera, en Flickr
 IMGP9515 by Daniel Gonzalez Aguilera, en Flickr
 IMGP9671 by Daniel Gonzalez Aguilera, en Flickr
 IMGP9662 by Daniel Gonzalez Aguilera, en Flickr
IMGP4228 by Daniel Gonzalez Aguilera, en Flickr
 IMGP9989 by Daniel Gonzalez Aguilera, en Flickr
 IMGP1730 by Daniel Gonzalez Aguilera, en Flickr
 IMGP3555 by Daniel Gonzalez Aguilera, en Flickr
 IMGP4581 by Daniel Gonzalez Aguilera, en Flickr
Ferrari won in Hypercar (highest class)
 IMGP6086 by Daniel Gonzalez Aguilera, en Flickr
 IMGP6297 by Daniel Gonzalez Aguilera, en Flickr
In the 2nd one (LMP2) a guy from Barcelona and it's team won (Albert Costa) which made me happy too.
 IMGP6427 by Daniel Gonzalez Aguilera, en Flickr
I hope you like the images,
Shutter speeds vary depending on the situation and the moment,
All the best,
P.S.
Pentax CAN DO Motorsports :)
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Forum: Lens Clubs
07-23-2019, 01:07 PM
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Decided I'd better join in, fellow DFA 150-450 users.
I had previously posted about adding an eyebolt for a strap to the tripod foot in the 300mm plus lens club. If anyone (UK) wants help doing this (lacking taps , drill press etc) msg me.
Couple of pics from this summer...
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Forum: Pentax News and Rumors
12-09-2022, 05:29 AM
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Forum: Pentax K-3 III
11-13-2022, 04:58 AM
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Pentax have sorted the continuous AF gremlins with the K-1 II and K3 III , and I think the KP is also much improved.
My K-1 (version 1) was not the best for AF-C when used with the older style DA lenses like DA* 60-250. Since I started using the K-1 II together with the modern DFA lenses like DFA 70-200 It gives me 9/10 keepers.
So my advice for you is to look at the K3 III paired with a modern (non screwdrive) lens.
 IMGP0179 by Peter Schluter, on Flickr
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Forum: Pentax K-3 III
10-28-2022, 05:30 PM
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I have been using Pentax as astrophotography camera with or without altazimuth mount for years. In the old days, K3II, K-1 with built-in astrotracer are great, but you always feel it is just a backup plan. This summer I used K3III intensively with the new version firmware and astrotracer Type 3. The result is amazing and a game changer. It makes Pentax astrophotography with astrotracer a different world. All the photos are shot with DA200mm and ISO3200,F4,60" near 20 frames and dark, flat, darkflat, bias frames. STC Clip-in filter made in Taiwan is a booster. They work great.
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Forum: Pentax News and Rumors
10-19-2022, 02:45 PM
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Funny thing is, several people here are complaining about this 'pay for additional software features' policy but nobody has complained about the upgrade not being available to K-3 Mark III. :p
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Forum: Pentax News and Rumors
09-20-2022, 03:46 PM
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My silver K3iii premium kit is saying “stay way from the dark side”. ��
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Forum: Pentax SLR Lens Discussion
08-13-2022, 04:34 AM
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Forum: Pentax K-3 III
08-12-2022, 03:31 AM
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My wife bought the DA *16-50 mm PLM recently. I'm not sure how much she'll let me use it -- she mainly plans to use it for weddings. I will say that it is a really nice lens -- much better build than the original DA *16-50 (which I also own), faster focusing, and has much better performance at f2.8 than the older version.
Country Road at Sunset (DA *16-50 PLM)
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Forum: Pentax K-3 III
08-11-2022, 12:35 PM
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three stages of wing foiling in one photo
down
Restarting
success
 Quote: Wing Foiling: A Beginners Guide . . . .
What is winging?
The rider holds a wing that is not too dissimilar from an inflatable kite. Most wings take their shape and rigidity once fully inflated, however, some wings have a physical boom structure to increase stiffness. The rider stands on a board and uses the wing to harness wind energy which in turn, powers them along. Where this sport differs from any other wind-powered water sport is that the wing is handheld and not attached to the rider by a harness nor the board. This makes it an extremely free-flowing sport and is part of the reason so many people love it.
What is wing foiling?
. . . Wing foiling is where the rider uses the same type of handheld wing to power them along but now with the introduction of a hydrofoil. A hydrofoil can be mounted onto a variety of different sized boards. The more beginner boards being larger and higher volume whereas advanced boards will be much smaller and partially sink under the rider's weight.. . . https://www.ikointl.com/blog/wing-foiling-beginners-guide
K 3 III + HD PENTAX-DA 55-300mm F4.5-6.3 ED PLM WR RE
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Forum: Pentax K-3 III
08-08-2022, 06:47 PM
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Still my favorite lens :)
All with K-3 III and DA* 300mm f4
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Forum: Pentax K-3 III
08-08-2022, 03:38 AM
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Forum: Pentax K-3 III
08-07-2022, 03:20 AM
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Forum: Pentax SLR Lens Discussion
08-12-2022, 12:17 AM
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PENTAX K-1 • FF Mode • 100 ISO • Pentax FA* 85mm F1.4 (IF) SE • Kenko Pz-AF UniPlus Tube 25
PENTAX K-1 • FF Mode • 1600 ISO • Tamron SP AF Di 90mm F2.8 Macro • Kenko Pz-AF UniPlus Tube 25
PENTAX K-1 • FF Mode • 100 ISO • Pentax FA* 85mm F1.4 (IF) SE • Kenko Pz-AF UniPlus Tube 25
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Forum: Pentax SLR Lens Discussion
08-11-2022, 01:41 PM
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Forum: Pentax K-3 III
07-31-2022, 06:36 PM
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Forum: Pentax K-3 III
07-31-2022, 01:43 PM
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This morning we had not only one or two Cooper's Hawk, but FIVE, where most were juveniles, and possibly an adult was present in the pack. They were hanging in the backyard trees, looking for a lunch. They were hunting in group around our feeders.
Épervier de Cooper / Cooper's Hawk [Accipiter cooperii] |
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Forum: Pentax K-3 III
07-29-2022, 06:06 PM
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Forum: Pentax K-3 III
07-25-2022, 08:05 AM
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Forum: Pentax K-3 III
07-24-2022, 05:01 PM
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I have to try the astro tracer some time, been a while, I have the O-GPS but don't often break it out. Took this recently, using a hat + bedrock as a "tripod" (forgot my tripod.)
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