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06-19-2008, 10:38 AM   #1
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Close up with FA 50 f/1.4 with + unknown adapter

I happen to have a close up filter that has the wording of 1:1 matching macro adapter but I have no idea of that brand and what it is matched up with. It is 49mm and I put it on my FA 50 f/1.4 and give it a go this morning with harsh lighting and I cover the flowers in my own shadow. I don't know if this is close to 1:2 magnification as a result. And I have new found love with my FA 50 f/1.4 with this mysterious macro adapter that looks like a close up filter but much thicker in glass.



All are taken hand-held with K10D in jpg with
Pentax FA 50 f/1.4 + [updated: Cosina/Pentax/Phoenix AF 100mm f/3.5 Macro]

#1
1/500 sec, f/2.0, 50mm , iso 100, O Ev
I need to fix up the CA/PF


#2
1/250 sec, f/2.8, 50mm, iso 100, 0 Ev


#3
1/125 sec, f/2.8, 50mm, iso 100, 0 Ev


#4
1/125 sec, f/2.8, 50mm, iso 100, 0 Ev


I love the bokeh in my FA 50 and with the macro adapter added, the IQ looks alright to me in f/2.8. C&C welcome.

Thanks,
Hin


Last edited by hinman; 06-24-2008 at 05:58 PM.
06-19-2008, 12:07 PM   #2
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Great results. I bet some of us would like to know exactly what kind (brand & model) close up adapter you used.

That is a keeper piece of hardware.

RB
06-19-2008, 12:35 PM   #3
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QuoteOriginally posted by rburgoss Quote
Great results. I bet some of us would like to know exactly what kind (brand & model) close up adapter you used.

That is a keeper piece of hardware.

RB
Thanks for the comment. I got the 1:1 macro adapter from the purchase of a 55mm Sigma older 75-300 DL lens and it can't be fitting with that lens. And without brand and model, I have no way to tell what the 1:1 macro adapter is used with. I will have a picture of the mysterious macro adapter later on. It looks like a close up filter or diopter except that it is much thicker in the glass, like twice as thick, and it is surrounded with a thick black ring. Will post picture of the adapter later on.

Once the adapter is mounted, it has a much narrower dof but all the autofocus works as expected. And I honestly don't see much loss in the bokeh and color. Here is one done in f/1.4


#5
1/1250 sec, f/1.4, 50mm, iso 100, 0 Ev


I really have new found love with my FA 50 f/1.4.

Regards,
Hin

Last edited by hinman; 06-19-2008 at 12:43 PM.
06-19-2008, 01:51 PM   #4
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wow they look great~ so the lens become fully manual when use the adapter, right?

06-19-2008, 01:56 PM   #5
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QuoteOriginally posted by vizjerei Quote
wow they look great~ so the lens become fully manual when use the adapter, right?
The AF stays on and I think my macro adapter is similar to a close up filter (or diopter) only it brings my FA 50 f/1.4 to about 1:3 and 1:2 magnification. Once my adapter is on, the DOF is very narrow and I can't focus past few feet away. And I shoot the series in about 1/2 feet away from subject

I will try to take a picture of my strange macro adapter. I am afraid, I won't be able to find out the brand and what it actually was.

Thanks,
Hin
06-19-2008, 03:21 PM   #6
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Here is how the macro close up adapter looks like


wording: matched macro adapter 1:1


Adapter next to a Tiffen +1 and +2 close up filter. The glass is thicker.



With mounting of the adapter, I shot against a ruler and at closest distance with a focus, I see about 68mm and without the adapter, I see about 140mm. Using Miserere's suggested formula of dividing the seen width into 23.5, I get roughly 1:2.9 magnification. Without the adapter, I get 140mm/23.5mm, roughly 1:6 magnification with the FA 50 f/1.4. I am not familiar with the formula and measurement, all are rough estimate.

Last edited by hinman; 06-19-2008 at 06:48 PM.
06-19-2008, 03:39 PM   #7
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Looks like it might be the Cosina/Pentax mentioned in this review. Cosina AF 100mm f/3.5 macro (Pentax) - Lab Test Report/Review
06-19-2008, 04:03 PM   #8
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QuoteOriginally posted by audiobomber Quote
Looks like it might be the Cosina/Pentax mentioned in this review. Cosina AF 100mm f/3.5 macro (Pentax) - Lab Test Report/Review
Yes, it looks like the adapter seen in that article. And Peter Zack actually mentioned about this adapter in another forum even before seeing the pictur. And here is a picture of the adapter mounted on FA 50 f/1.4




The result looks very pleasing to me. And I have a sharper lens with 1:2 macro with Pentax A 50mm f/2.8 1:2 Macro and I should have tried this adapter to get to life size in 1:1 macro. Life is exciting when you discover unused gear to be of greater potential than previously thought.

Thanks,
Hin

06-19-2008, 04:07 PM   #9
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The screw on diopter lens is for the Vivitar/Cosina 100mm f/3.5 Macro (aka plastic fantastic). The lens on its own goes to 1:2 and the diopter screws on to bring it to 1:1 magnification. Got two of them!
06-19-2008, 06:24 PM   #10
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QuoteOriginally posted by creampuff Quote
The screw on diopter lens is for the Vivitar/Cosina 100mm f/3.5 Macro (aka plastic fantastic). The lens on its own goes to 1:2 and the diopter screws on to bring it to 1:1 magnification. Got two of them!
Thanks for the comment and confirmation. How did you get two of those? Can these be purchased individually? Are they any better than other +1, +2, +4 diopter? Any noticeable degradation to IQ and sharpness that you notice?

I will try the adapter on my Pentax A 50mm f/2.8 1:2 Macro and report later later on.

Much thanks,
Hin

Last edited by hinman; 06-19-2008 at 06:49 PM.
06-19-2008, 06:52 PM   #11
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QuoteOriginally posted by hinman Quote
Thanks for the comment and confirmation. How did you get two of those? Can these be purchased individually? Are they any better than other +1, +2, +4 diopter? Any noticeable degradation to IQ and sharpness that you notice?

I will try the adapter on my Pentax A 50mm f/2.8 1:2 Macro and report later later on.

Much thanks,
Hin
Had a 2 copies of this lens for Nikon and Minolta mounts that had haze on the elements. The closeup diopter was the only thing that could be salvaged. I believe they are stronger than the +1, +2 and +4 diopters.

Of course an extension tube would be better for getting 1:1 optically but it would have meant quite a long tube, possible loss of aperture coupling and light loss. These were made as a cheap way of getting 1:1 without a bulkier setup nor loss of auto exposure metering.
06-19-2008, 07:00 PM   #12
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QuoteOriginally posted by creampuff Quote
Had a 2 copies of this lens for Nikon and Minolta mounts that had haze on the elements. The closeup diopter was the only thing that could be salvaged. I believe they are stronger than the +1, +2 and +4 diopters.

Of course an extension tube would be better for getting 1:1 optically but it would have meant quite a long tube, possible loss of aperture coupling and light loss. These were made as a cheap way of getting 1:1 without a bulkier setup nor loss of auto exposure metering.
Thanks for the info. Another shot with some focal b&w in pp.


#6


#7


Last edited by hinman; 06-19-2008 at 07:47 PM.
06-20-2008, 06:43 AM   #13
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QuoteOriginally posted by creampuff Quote

Of course an extension tube would be better for getting 1:1 optically but it would have meant quite a long tube, possible loss of aperture coupling and light loss. These were made as a cheap way of getting 1:1 without a bulkier setup nor loss of auto exposure metering.
Thanks for the input on extension tubes. I just won a high bid on a Vivitar at-22 extension tubes and I hope that one has auto metering and I certainly don't mind the manual focusing. It is a shame that I bid for $86.00 and I normally see around $50 before and I was close in giving up and go for the Kenko new extension tubes for $160.

I can imagine the bulkier setting with tubes mounted between body and lens. If you and others know of extension tube to recommend, please share. Also, is it true that with tubes, it is much harder to hand hold the lens? There is so much to learn before I gave up and go for the 1:1 lens. My two lens on wish list are DA 35 Macro and Tamron SP 90 f/2.8 Macro

But for now the adapter really comes in handy like a UV filter with my beloved FA 50 f/1.4, A 50mm f/2.8 1:2 Macro, Jupiter9 85 f/2.0 and Pentacon 50mm f/1.8 as all of the four lens share 49mm filter thread and they all have good close focusing capability

Last edited by hinman; 06-24-2008 at 06:01 PM.
06-20-2008, 06:52 AM   #14
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A great series showing true potential of this lens


cheers
06-20-2008, 07:08 AM   #15
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UAU, i have that Cosina 100mm macro lens with the matching adapter, it never occurred me that i could use it with other lens.
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