What are smallest-lightest in 20-30mm range for Pentax?

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What are smallest-lightest in 20-30mm range for Pentax?

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RioRico

Joined: 12 Mar 2010
Posts: 1120
Location: California or Guatemala or somewhere

Posted: Tue Dec 20, 2011 7:48 pm Post subject:

RioRico wrote:

Smull wrote:

What about the voigtlander skopor 20/3,5. It's very small, available for Pentax and I heard it was good!

Alas, I haven't US$600 to spend on one. Darn...

iangreenhalgh1 wrote:

I got a huge Docter Optics zoom and a Tair-3C, between those two that's a few kilos of steel! lol

Oh, I have my share of heavyweights. Bench-pressing them is good exercise, yes indeed.

Quote:

More seriously, I second David's recommendation of the Pentacon/Meyer 3.5/30, cracking lens and really small.

Y'all have convinced me to grab that. I think I saw that it's around 200g so a bit much for the mini-kit, but worth having and using anyway. Is it a cut above the Lydith 30/3.5, or the Meyer Ostregon or Pentacon 29/2.8? I really don't know much about these.
_________________
Too many film+digi cams+lenses, oh my -- Pentax K20D, K-1000, M42s, more
The simple truth is this: There are no neutral photographs. --F-Stop Fitzgerald

erkie

Joined: 08 Oct 2011
Posts: 308
Location: Missouri

Posted: Tue Dec 20, 2011 9:59 pm Post subject:

erkie wrote: I've been told by very reliable sources here that it is the lydith in drag ! Hence my own search for this little gem _________________ I shoot film and meter with digital Asahi H3v, Praktica FX3, Retina IIa, Spotmatic sp1000, Fujica V2, Yashica lynx5000, Pentax Sf1, Minolta SRT102, Minolta7000i, Pentax MX, Pentax ME, Pentax Kx lensesM42- Isco Gottingen Westanar 50/2.8, Isco Gottingen Westron 35/2.8, Rikenon 35/2.8, Spiratone Tc 105/2.5, Spiratone Tc 200/4.5, Sankyo Kohki Komura 300/5, Sankyo Kohki Komura 135/3.5, Auto Tak 35/3.5, Super Tak 150/4, S-M-C Tak 50/1.4, S-M-C Tak 28/3.5, SMC Tak 55/2, Mamya Sekor 55/1.8 K- mount- Helios 44-K-4, Jc penny 28/2.8, Da 18-55, Da 55-300, Pentax F 35-70, SMCP M 50/1.4, SMCP M 50/1.7

barnaby

Level 1

Joined: 21 Mar 2010
Posts: 59
Location: Hampshire UK

Posted: Tue Dec 20, 2011 10:18 pm Post subject:

barnaby wrote: Can Pentax 110 lenses be adapted? _________________ If it ain't broke, don't fix it.

RioRico

Joined: 12 Mar 2010
Posts: 1120
Location: California or Guatemala or somewhere

Posted: Tue Dec 20, 2011 11:10 pm Post subject:

RioRico wrote:

erkie wrote:

I've been told by very reliable sources here that it is the lydith in drag !

I suspected that but I had to ask. Should the 29/2.8s be avoided?

barnaby wrote:

Can Pentax 110 lenses be adapted?

I was going to say: No, not if I want anything near infinity focus. P110 register is 27mm, even shorter than Leica M and LTM. I have adapted Argus lenses with register about 35mm, by sticking the Argus through a PK body cap by 11mm to compensate for the register difference. But going back another 8mm would just be too far.

Then I thought, hmmm, maybe. I just stuck my only LTM lens (with too wide a base for further testing) into M42 and PK-mount SLRs and the results are promising. If LTM works, then P110 might. But then I think: Why hasn't anyone made LTM-dSLR adapters (for Canon and Pentax anyway) that pushes the lens into the mount throat? One problem is that the PK mount throat is only about 42mm wide, so it needs narrower lenses to fit. But that is worth checking out!

So for further testing, what is the cheapest, meanest, slimmest LTM lens I'm likely to find? (Oh, this could open the door to more LBA!) But I suspect that the image circle of P110 lenses will be too small. Unless used as full-circle fisheyes maybe? If I can find a cheap P110 lens, that will certainly be worth testing!

EDIT: I just check data on P110 lenses and the 18 and 24 are certainly small enough to fit down a PK throat. The 24 isn't much liked -- bad flare -- but it should be cheap for testing. And if it works... VOILA!
_________________
Too many film+digi cams+lenses, oh my -- Pentax K20D, K-1000, M42s, more
The simple truth is this: There are no neutral photographs. --F-Stop Fitzgerald

iangreenhalgh1

Joined: 18 Mar 2011
Posts: 15679

Supporting Member

Expire: 2014-01-07

Posted: Tue Dec 20, 2011 11:26 pm Post subject:

iangreenhalgh1 wrote: P110 lenses work fine on NEX. I didn't get good IQ from mine though. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it!

izvar

Joined: 17 Feb 2011
Posts: 252
Location: Moldova

Posted: Wed Dec 21, 2011 7:57 am Post subject:

izvar wrote: Asahi Super-Multi-Coated TAKUMAR 20/4.5 - 250g - super-wide and very light , for comparison my Nikkor-UD 20/3.5 weight - 390g _________________ “The hardest thing of all is to find a black cat in a dark room, especially if there is no cat.” ― Confucius

RioRico

Joined: 12 Mar 2010
Posts: 1120
Location: California or Guatemala or somewhere

Posted: Wed Dec 21, 2011 10:04 pm Post subject:

RioRico wrote:

iangreenhalgh1 wrote:

P110 lenses work fine on NEX. I didn't get good IQ from mine though.

NEX register is a bit shorter than PK. And if your P110 lens is the 24, it's not well thought of -- big flare, etc. The 18, 50 and 70 are rated rather higher. I just won a P110 with the 18/2.8 so I'll get to see how|if it works. If nothing else, I'll have another Pentax cam to display.

izvar wrote:

Asahi Super-Multi-Coated TAKUMAR 20/4.5 - 250g - super-wide and very light , for comparison my Nikkor-UD 20/3.5 weight - 390g

That would be a nice one to have, much smaller than my Tokina 21/3.4. A bit heavy for this mini-kit, but it's on my want list.
_________________
Too many film+digi cams+lenses, oh my -- Pentax K20D, K-1000, M42s, more
The simple truth is this: There are no neutral photographs. --F-Stop Fitzgerald

walter g

Joined: 20 Feb 2010
Posts: 2463
Location: NC, USA

Posted: Wed Dec 21, 2011 10:39 pm Post subject:

walter g wrote: I don't have a much space or light to shoot lens pics in so sorry for the bad pic. I thought I'd post this for size comparison. Left is the Fuijita made 2.5/35, in the middle for size comparison is my FED 3.5/50, right is the Fujita made 4.5/135, in the back for size comparison is a normal sized 35mm, the Minolta 2.8/35 HG _________________ Main cameras Panasonic G5,Nikon J1,Pentax Q10,Sony Nex 6 Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC Celtic 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PG 1.4/50, MC Rokkor X PG 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200 MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6 Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50, Auto 3.5/135 Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses

RioRico

Joined: 12 Mar 2010
Posts: 1120
Location: California or Guatemala or somewhere

Posted: Wed Dec 21, 2011 10:52 pm Post subject:

RioRico wrote:

walter g wrote:

Left is the Fuijita made 2.5/35, in the middle for size comparison is my FED 3.5/50, right is the Fujita made 4.5/135, in the back for size comparison is a normal sized 35mm, the Minolta 2.8/35 HG

Those are indeed compact! The Fujitas are on par with my Sandmar 35/4.5 and Tele-Sandmar 100/4.5, and undoubtedly sharper. I've read that the Fujita tele is the smallest 135 around. Darn, now I'll have to start looking for those...
_________________
Too many film+digi cams+lenses, oh my -- Pentax K20D, K-1000, M42s, more
The simple truth is this: There are no neutral photographs. --F-Stop Fitzgerald

iangreenhalgh1

Joined: 18 Mar 2011
Posts: 15679

Supporting Member

Expire: 2014-01-07

Posted: Thu Dec 22, 2011 1:43 am Post subject:

iangreenhalgh1 wrote:

RioRico wrote:

iangreenhalgh1 wrote:

P110 lenses work fine on NEX. I didn't get good IQ from mine though.

izvar wrote:

Asahi Super-Multi-Coated TAKUMAR 20/4.5 - 250g - super-wide and very light , for comparison my Nikkor-UD 20/3.5 weight - 390g

That would be a nice one to have, much smaller than my Tokina 21/3.4. A bit heavy for this mini-kit, but it's on my want list.

I have the 18, 24 and 50, none of them performed well for me.
_________________
I don't care who designed it, who made it or what country it comes from - I just enjoy using it!

RioRico

Joined: 12 Mar 2010
Posts: 1120
Location: California or Guatemala or somewhere

Posted: Thu Dec 29, 2011 9:00 am Post subject:

RioRico wrote:

iangreenhalgh1 wrote:

I have the 18, 24 and 50, none of them performed well for me.

My Auto 110 just arrived, complete with the 18/2.8. And I cannot force-fit the lens onto a PK mount in any way, no matter how perverted. Luckily the kit was cheap, and will look nice on the display shelf next to the Spotty, K1000, and MV1.

And I'm still searching for an ultralight in the 20-30mm range. This may be a long-term quest, my Holy Grail (without Pythons).
_________________
Too many film+digi cams+lenses, oh my -- Pentax K20D, K-1000, M42s, more
The simple truth is this: There are no neutral photographs. --F-Stop Fitzgerald

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