Showcase Pentax 50mm f2.8 (fixed) Auto 110

CCRoo

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Focus is sharp at center.

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edwardconde

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Thought I would some of my recent images using this lens wide open...
As stated before, the Center is sharp as a tack!

View attachment 262781

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gnarlydog australia

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I am honestly surprised by this diminutive lens and it outperforms most of the vintage Russian glass I have
Being small is the icing on the cake for me
First images while I still learn how this lens works and how much DOF I get

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Beer o'clock_c by gnarlydog, on Flickr


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Martini ciclismo team_3 by gnarlydog, on Flickr
 

gnarlydog australia

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gnarlydog australia

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gnarlydog australia

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As I wanted to travel light on a 3 nights off-track backpacking trip I had me with me the Pentax-110 50mm
I like the fixed f2.8 made me think to compose my subjects more carefully to not make them appear blurry. While manual focus was a challenge on moving subjects I like how the lens renders the natural OOF background.

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Melt and Gill_5_c by gnarlydog, on Flickr
 

pellicle

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again, I can't believe there hasn't been a post of mine to showcase for this lens....

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and its quite compact on a "compact" style body:
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gnarlydog australia

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and its quite compact on a "compact" style body:
gf-50.jpg
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the Pentax-110 lenses are truly compact, to the point that the 24mm is kind of hard to grab by the focus ring without a lens hood. Not a totally versatile lens as "walk about" (the fixed f2.8 makes me occasionally wish for more DOF) but it makes up in portability :dance2:
Not exactly a "manly" lens to impress the ladies ;)
 

gnarlydog australia

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pellicle

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this one with an extension ring of 10mm since the minimum focusing distance isn't that close, however if I had the Pentax 37.5mm close-up filter I could have achieved similar results

actually I think you'll have better results the way you've used it. I started out using close-up filters and they can be good, but the improvement of the image using extension rings is worth it. I think too you'll find that you minimise the issues with "curvature of field" in the focus as well as clean up the bokeh too.

Its a great shot btw.
 

gnarlydog australia

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actually I think you'll have better results the way you've used it. I started out using close-up filters and they can be good, but the improvement of the image using extension rings is worth it. I think too you'll find that you minimise the issues with "curvature of field" in the focus as well as clean up the bokeh too.

Its a great shot btw.
Thank you.
The 10mm ring on the 50mm or the 70mm is OK allowing still decent close-up but not total über macro style. If I put 10mm on the 24mm however the subject distance becomes way too close and magnification is too big for most in-the-field stuff.
I have ordered some small rings for C-mount that I might use between lens and adapter. I have not mounted the Pentax-110 lenses on the "proper" P110 to M43 adapter but directly glued them on a M39 to m43 adapter as the spacing is pretty close to what it needs to be. With C-mount rings I will unglue the lens and mount it differently.
I will fiddle around and see if I can come up with a better, more gradual macro rings set up for those lenses.
Some will ask why I just don't use a proper close-up lens (which I have: the brilliant Vivitar 28mm f2.0) but I want to use the Pentax-110 lenses for when I really need to travel light (like backpacking).
And ultimately to subscribe to the "It's not what you have, it's how you use it".... or that is what she said :)
 

pellicle

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I have ordered some small rings for C-mount that I might use between lens and adapter.
you may find that a set of ultra cheap no electronics m43 mount extension rings will exactly do the trick in giving you more extension and allow you to slap them on any other legacy lens mounted to m43 to boot
 

gnarlydog australia

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you may find that a set of ultra cheap no electronics m43 mount extension rings will exactly do the trick in giving you more extension and allow you to slap them on any other legacy lens mounted to m43 to boot
that is exactly what I use: cheap extension rings for M43, with contacts, that work of course just fine on vintage lenses.
The problem is that the shortest ring is 10mm thick and that's way too much on the Pentax-110 24mm lens. I need something about half that thick and I think the C-mount rings will be about right.
Of course for the 50mm and the 70mm lenses the M43 macro rings are fine.
 

pellicle

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that is exactly what I use: cheap extension rings for M43, with contacts, that work of course just fine on vintage lenses.
The problem is that the shortest ring is 10mm thick and that's way too much on the Pentax-110 24mm lens.
ahh ... mis understood

I myself think that the 24mm is an inappropriate focal length for macro. I reckon that in 35mm land there was a reason that the 100mm range was the more popular. Better working distance.

It'd hard to beat the 50mm and a couple of extension rings for light compact rugged packable macro in the field.

You may want a small disk of paper cut out with a small hole in it to jam in behind the 50 to give you a better aperture for macro...
 
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Good to see another Pentax 110 fan reviving this thread. There is some discussion about how best to stop down on the thread for the 18mm lens. Pellicle likes to use bits of paper, I used Lens Baby discs, others seem to like the adapter with variable aperture. Personally I mainly stay at f8 now, and whip the disc out if I want shallow dof. I must post a few.
 
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Here are a couple...
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