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Wednesday, 19 March 2025

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You know what's one more "Big Honkin' Normal" for Pentax APS-C? It's an FA lens: the HD (or SMC) 31mm f1.8 Limited. It's what I use a lot of the time on my K-3 III Monochrome, because the images are just that good. Sure, the 31mm is a fast wide angle on FF, and for that reason comes the heft. It has a lot of glass! But the ~46.5mm effective on APS-C is oh-so-useful. Definitely feels less tight than ~52.5mm of a 35mm lens. And did I mention the images? It draws differently on APS-C than full frame, probably due to the fact that you don't see the corners, which vignette a bit and contribute to a 3D effect on a K-1.

I'm with you on the 50's Field of View...It just doesn't fit my eye. I shoot roughly 70 percent of my images 30mm or wider - generally a LOT wider -- and 20 percent portrait/short tele. My other 10,000 lenses fill up the final 10 percent.
Indeed, when every "serious" 35mm camera came with a 50 I was infamous for giving them away to people who'd bought kit zooms. I do have the SMC Pentax 50mm F1.2, because...well, because 1.2.
These days my daily driver is the Pentax K-3 III Monochrome and, interestingly enough, the tack-sharp SMC Pentax-D FA 50mm F2.8 Macro has become one of my daily drivers.
I bought the 50 Macro to digitize old negatives, but it has proven so good and just outright fun that it has become a Monochrome daily driver, along with the wonderful HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE, and which ever of the 15 Limited and SMC 20 I am feeling that day. So I'm with you on the Macro as a walking around lens, too!

Cjf

I want to comment about the M-SMC Takumar 50mm f/1.4 that you talked me into the first time that you wrote about it. I tried it again, with an adapter, on my Lumix S5II (L-mount like the fp you have.). It is still a lovely lens. A bit lower contrast than a "modern" lens but rich gradations between tones, especially in black and white. The focusing is just smooth and creamy. I think I'll leave it on for a while.

I have seriously considered the SMC DA 35/2.8 Macro Limited. I have the SMC Pentax-DA 35mm F2.4 AL (aka "Plastic Fantastic" or "Stupid Cheap") lens already and it's insanely good. Noisy autofocus but the optical quality is up the with the best I own from Leica, Nikon and Zeiss.

But I decided for the tiny bit better speed and and the little better reviews and went with the SMC Pentax-FA 35mm F2 AL for my crop sensor needs. It has proven to be an exquisite choice thus far.

When I go out the door every day, I have my K-3, that 35/2 and camera is set up with pre-sets of U1: RAW, U2: Landscape color, tweaked for my tastes, JPG. & U3: Monochrome with a yellow filter effect, JPG. I always have wider and longer lenses along and even the magnificent HD DA 20-40 Limited zoom but it's the 35/2 that I start out with mounted.

OTOH, I have no doubt that I will eventually get the macro as well. I'll excuse it by saying I need to compare the various 35's against each other and I might just need, someday, the close focus of that macro capability...

But I'll really do it just because it's fun and I'm loving this late excursion into all things Pentaxian.

But it’s a 35 not 50! Therefore not Nifty.
Most alive thirty five?
The no jive 35?

The distance from the front element at 1:1 must be pretty close, you can do retro focal optical tricks to push the film/sensor plane back and clear the mirror but no such luck in front.

[53.5mm equivalent. Close enough! --Mike]

“More's the pity for me. A 35mm DA Macro on a K3 III or K3 III Monochrome would be the ant's pants. You could live happily ever after. Assuming you want to shoot with a ~50mm prime.”

You could use the FA 31 with the K3 III Mono. It’d be just outside your favorite range of 40-45mm at 46.5mm. And I think you might enjoy the results. A few random samples with no editing, other than converting the DNG’s using ACR and PS.

https://flic.kr/p/2oGeM4h

https://flic.kr/p/2otvbVs

https://flic.kr/p/2oyntu1

Nice shot of the '62 Corvette, Ned! Last of the solid axle Corvettes and had a "preview" of the '63-'67 Stingray back end.

Going from memory, I believe those wheel covers were quite expensive to produce, so GM went to a one-piece design thereafter.

That 31 mm Limited works a treat on the K3 III. Nice sharp contrast, but not overdone. You captured a nice glow on the side of the car.

Here's what Pentax Forums had to says about the DA35 Limited in both guises:

https://www.pentaxforums.com/reviews/hd-pentax-limited-primes/conclusion.html

"What we can objectively conclude is that the HD lenses do a much better job of suppressing ghosting, and in harsh lighting they may produce images with more contrast."

"If we could only choose one of the five, it would the 35mm Macro, as it offers corner-to-corner sharpness and doubles as a fantastic standard walkaround lens."

Thanks, Dave. I know the owner of the Corvette. He’s a very good photographer and joked he could have bought a Leica for what it cost him to restore those wheel covers.

I was actually surprised how much more detail the K-3 III Mono pulled out of my three FA’s (31, 43, 77) versus the K-1. And as you noticed, there’s also an increase in contrast, but still the lovely OOF transition and rendering I’m used to.

Ned,

Wow! I knew that restoring old cars was expensive, but choosing between a Leica or restored wheel covers would make most people think twice!

Thanks for the quick comparison between the K3 III and K1 with regard to the lens. That's interesting to hear there's a definite difference in output. Do you think the monochrome sensor has more to do with the increased contrast than the sensor's size (compared to the K-1)?

I don't have the 31mm Ltd yet, but of the other two, I love that 77mm Ltd. Such good photos, especially around sunset.

Dave, the K-3 III monochrome sensor captures greater sharpness and detail since it passes all light through each photo site. There’s more data, and demosaicing is not required to produce the image using a color (Bayer) filter which the K-1 II has. The result is better image clarity and less noise.

I know Mike went into a lot of detail about this when he had his Sigma fp converted to BW, but I couldn’t find the post to give you a link.

Agree, the FA 77 produces wonderful images. But you should consider getting the FA 31 at some point. It’s a great lens for everyday use due to its’ FOV and the rendering is just superb.

Just reminding Mike that a DFA Pentax 31 Limited on a K-3lll gives a 46mm field of view. Plus all the glorious bokeh! I know he's aware of this, but he never mentions the option when he years for a wide normal.

Ned,

Sorry to send you in search of Mike's post about his Sigma fp! I guess I wasn't clear about the effect the DX sensor would have on the overall appearance (with greater depth of field compared to a full-frame sensor), but you answered that question anyhow -- it's basically all due to the monochrome sensor. I will search for Mike's Sigma fp posts to refresh my memory.

I already have the 35 mm f/2 lens for family snapshots, but now you've got me thinking about the 31 mm Limited and the K3 III Monochrome!

Thanks again for your insights.

Well, I got the 31 mm Limited. On sale, so that was nice. ;>)

[Congratulations. May it give you many gifts. --Mike]

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