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02-23-2013, 03:26 PM   #316
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(1980?) Vivitar Zoom Macro 80-200. Here are some long distance shots from this lens. The line of sight distances are, in order: 6, 10, and 12 miles. In camera jpeg with only a one step enhancement in PP.





Using the macro function of the Vivitar, I held this dime size coin in my hand and lifted it into the focus zone. Magnification is more that the customary 25%. The coin was about one foot away so one has working distance.

posted in this thread:
https://www.pentaxforums.com/forums/pentax-q/189966-what-q-accessories-worth-11.html#post2288463


Last edited by arnold; 09-02-2014 at 08:41 PM. Reason: added coin image
02-25-2013, 08:33 PM   #317
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Pentax SMC M 200mm F4

The Pentax M200 provides 1100mm effective crop length on the Q.
The focus ring is a joy to use, it is big and well damped, with nice travel through the focus point.
Since it is not a modern lens, it shows the typical issues with CA and purple fringing, but I have seen worse from other lenses.
The examples below were shot at f6.3? (the stop between f5.6 and f8 on the aperture ring.)
I used the Pentax adapter on L, so I could control the aperture with the lens. The setting was chosen to get the least amount of PF while not going to far into the diffraction range of the sensor.
The last shot of the hummingbird I did some post process to remove PF and sharpen it a bit.
The other shots are SOC but resized for the web.
In the linked video you can see what the hummingbird looked like before the PF removal, especially around the beak.

Lens on Q









02-25-2013, 08:57 PM   #318
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Glad you seem to like the M200 lens - does a nice job!

In my eyes our little Q's are bringing these classic lenses back to life. I need to get some shots done with my M135 soon if the weather would ever warm up!
02-25-2013, 09:12 PM   #319
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M42's...... Martin Uke back is a Vivitar 28mm F2.5. Next is SMC Takumar 50mm F1.4. Fotodiox m42/Q adapter.
Slightly sharpened in iPhoto since I can barely determine edge sharpness in LCD. As always, a work in progress.


Last edited by lukulele; 03-19-2014 at 04:42 PM.
02-26-2013, 02:02 AM   #320
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QuoteOriginally posted by crewl1 Quote
The examples below were shot at f6.3? (the stop between f5.6 and f8 on the aperture ring.)
6.7. Pentax likes using stupid numbers for the half stops, but in this case they and the math agree.

Reasonably rounded it goes 1.0, 1.2, 1.4, 1.7, 2.0, 2.4, 2.8, 3.4 (or 3.3), 4.0, 4.8 (or 4.7), 5.6 (or 5.7), 6.7, 8.0.

Pentax feels this should be 1.0, 1.2, 1.4, 1.7, 2.0, 2.5, 2.8, 3.5, 4.0, 4.5, 5.6, 6.7, 8.0.

Which would be less stupid if 2.5, 3.5 and 4.5 didn't also appear in the reasonable third stop scale (also used by Pentax).
02-26-2013, 07:42 AM   #321
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I was afraid the m200 f/4 would be under too much optical stress to perform well. It seems quite good for video though! It is such a nice lens size - shame that its optics are not quite as good as some others from the era. I will be testing it against the m75-150 (which seems a tad better in conventional shooting), and a Tokina 100-300 f/4 (the manual focus version) - the thing weighs a ton but at least the permanent tripod collar is built like an anvil.

My replacement Q 02 kit is coming today. I'm just hoping that Target.com didn't happen to get a whole bad batch. My in-tent test studio is all set up and ready to go. Plan is to test the kit lens at 15 (I know that's its worst setting), Zenitar 16, Tokina 24-40 f/2.8, FA35, A35-105, m50 f/1.4, m75-150, Samyang 85, m200, Tokina 100-300 f/4. I feel like in my limited testing done with the defective Q unit - 200 is the outer limit of usefulness even on a tripod.
02-26-2013, 08:10 PM   #322
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Recipe for a dirt cheap wide angle using your original AF lens.
1/ Hood with 52mm threads for filters.
2/ Add a 52mm uv filter
3/ Glue on a collumating lens ( Lens is concave in the back ) from an old lens. Easy to check just looking through one makes things look smaller.
Just hold it to the filter and check on the screen for focus and effect, some give a wider view than others.
Voila a Wide angle autofocus lens. Tested against my Pentax 18-55 it is equal to a 20mm. Close focus and infinity as well !

Last edited by bobpur; 11-23-2014 at 07:37 AM.
02-26-2013, 08:47 PM   #323
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QuoteOriginally posted by bobpur Quote
Recipe for a dirt cheap wide angle using your original AF lens.
1/ Hood with 52mm threads for filters.
2/ Add a 52mm uv filter
3/ Glue on a collumating lens ( Lens is concave in the back ) from an old lens. Easy to check just looking through one makes things look smaller.
Just hold it to the filter and check on the screen for focus and effect, some give a wider view than others.
Voila a Wide angle autofocus lens. Tested against my Pentax 18-55 it is equal to a 20mm. Close focus and infinity as well !
This is a great idea.
Is this using the 01 or 02 zoom?
Maybe some shots of and with the setup?

02-27-2013, 02:13 PM   #324
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As requested few shots with and without the Addon lenses.
Taken on tripod at about 4 feet away, more bad weather so no outside one for now.

Last edited by bobpur; 11-23-2014 at 07:37 AM.
02-28-2013, 02:30 PM   #325
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Watch the weight

I don't know the weight of your "Addon" diopter, but Ron (brandrx) over at the other forum discovered in the most unfortunate way that these little guys can only take so much "filter" screwed to the front. Considering the evident hit taken in IQ, I'd likely avoid taking the diopter route. These devices need to be stopped down significantly to perform at their best, but the Q system works best optically wide open or near it.
02-28-2013, 04:17 PM   #326
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QuoteOriginally posted by ScooterMaxi Jim Quote
I don't know the weight of your "Addon" diopter, but Ron (brandrx) over at the other forum discovered in the most unfortunate way that these little guys can only take so much "filter" screwed to the front. Considering the evident hit taken in IQ, I'd likely avoid taking the diopter route. These devices need to be stopped down significantly to perform at their best, but the Q system works best optically wide open or near it.
Hi

About 4 grams !, look at my previous thread.
No needed stop down or focus change and at 100% no apparent loss of quality just a little more distortion that is easily fixed. Much better
than the Pentax wide toy lens and 0 dollars.
Don't knock trying new things, this is Pentax. Something like Startrek going where no camera has gone before ! ( Within Reason
03-04-2013, 11:32 AM   #327
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02 zoom @ 15mm, Zenitar 16, 16-45 @16mm

Testing studio shot using the 5-15 at 15mm, Zenitar 16mm FE, and Pentax DA-16-45 at 16mm. In each instance, f/5.6 is the sharpest setting (using the generic, painted adapter collar on the 16-45 resulted in an f-stop setting probably closer to f/5.0). The studio is lit by three groups of full spectrum FLD, body white balance set at 5000 degrees. These shots are all JPEGs straight out of the camera unaltered. Having also outputted these in RAW (not posted here), I can say that the overall sharpness is closer when adjusted for exposure-contrast-clarity (no change in sharpness or noise reduction settings). Photos were taken at just beyond 2 feet (all these lenses focus to just slightly less than 1 foot).

Observations: the 02 zoom is markedly less sharp wide open (f/4.5), transmission is medium, contrast medium; rendering cool. The Zenitar is lowest quality due to high level of CA, but it is sharper at f/4 than the 02 lens at f/4.5; has high apparent transmission, and adjustments in RAW make it more competitive (other than wide open which yields a bloom-fest). The 16-45 is known to be weakest at 16mm, but you would never know it based on this comparison. Even at f/4, it had very little CA. Contrast is amazingly good. It apparently has lower transmission than the kit lens - the only down side.

1) Zoom 02 5-15 15mm at f/5.6
2) Zenitar 16mm FE at f/5.6
3) Pentax DA 16-45 16mm at ~ f/5.0
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03-04-2013, 05:41 PM   #328
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M*300

Has anyone tried the M*300 with Q? I do not find it listed in the header. Thanks for any information you can provide.
03-04-2013, 06:11 PM   #329
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QuoteOriginally posted by Mikesul Quote
Has anyone tried the M*300 with Q? I do not find it listed in the header. Thanks for any information you can provide.
I don't believe anyone has reported in with that lens yet.
03-05-2013, 08:03 PM   #330
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M*300

Yes, I did. Not too long ago on this thread, post #269, but just a couple of random shots.

https://www.pentaxforums.com/forums/pentax-q/209474-adapted-lenses-tested-q-r...ml#post2273920

The M*300/4 works great on Q. The contrast and color were great.
I was using a China made K adapter, handheld but leaning on window sill when making that shot.
I also have tried using K300/4 but the results were not as great.
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