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04-06-2015, 01:53 PM   #1
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Identifying 8-element Tak 50mm 1.4 using a single crappy photo

Hey guys, I just won an old Super-Takumar 50mm 1.4 for ~$50 on the ol' fleabay, and am now wondering if it might be the older 8-element version? The listing had only one blurry, noisy photo:

Unfortunately, it is basically impossible to make out any detail on the aperture scale to see where that little tick mark falls, so all I have to go on is front view and serial number #1551447 (although there's always a possibility that the faceplate was switched out). Anyone think they can identify the version? I'm assuming 7-element as it is much more common, but an 8-element would be a nice surprise I'll re-update the thread once I receive the lens. Thanks!

04-06-2015, 01:57 PM   #2
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Look closely at the ir marks on the aperture. I don't know the specifics but there may be enough detail there to tell.,

Mine has a red IR mark just to the right of the left hand 4 on the dof markings. It is a SN 147xxxx
04-06-2015, 07:38 PM   #3
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Hard to tell from the photo, My latest one is 149xxxx series see here:
04-06-2015, 08:08 PM   #4
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Mine is a 154xxx. I have doubts about lenses with serials higher than that in the database, many claim yellowing which is something you won't see in the 8-element.

Super-Takumar 50mm F1.4 (Early - 8 Elements) Serial Numbers - Pentax Serial Number Database -

04-06-2015, 08:15 PM   #5
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It looks like there's a bit of shading to the right of the "4" mark, whereas to the left it looks identical to the surrounding black. Like you said, it's difficult to
tell for certain based on that photo, but I think you might have bagged an 8-element.
04-06-2015, 10:05 PM   #6

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There is serial number overlap between the versions. With that serial number, it possible but more than likely not an 8-element. Check the IR mark and the rear element and the yellowing or lack of when you get it...
04-10-2015, 09:19 PM   #7
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Well everyone, the lens came in this afternoon, and I just got home to check it out...

Looks like I lucked out

IR mark to the right of the 4, and a protruding rear element confirms that this is indeed an 8-element version. Thanks everyone for chiming in with your guesses haha, just goes to show that gambles do pay off every once in a while. I'm mostly just excited to put it to some use!

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