Okay, now I have a SMC K 75mm f1.2 SE

minahasa · 03-01-2013, 12:59 AM

Yay! I'm in possesion of the extremely ultra rare, unknown to the world, SMC K 75mm f1.2 SE 'Swirly Edition'. -okay I lied. It's a regular K 50/1.2 fitted with front-mounted 1.5x Kenko KNT-15 conversion glass..

I red it somewhere, and decided to give it a try. Do a bit of research, and this Kenko KNT-15 seems to have a good review. It turns 50mm to 75mm, correct me if I'm wrong, yet still preserves the 'speed' of the glass. It has a 52mm threads, so I tried fitting it to my 50/1.2 for a quick shot. Unlike using the rear-mount TC's that looses light, and jeopardizing quality, these kinds of extension seems 'safer' and to my eyes seemed with no real loss of quality.

Without the extension:

With the extension:

Did I mention swirly? Oh yes, that's the interesting part. To my surprise, the extension seems to posses some kind of magic, it transforms 'regular' lenses into swirlies!

Lucky me, I almost jump on that $160 Jupiter 85mm..

yusuf · 03-01-2013, 02:07 AM

I guess it will be your 75mm f1.8 (1.2 *1.5)

and probably Jupiter 9 @f2 is sharper than those images.

hoanpham · 03-01-2013, 03:37 AM

Blasphemi. misuse of legacy glass

Nice try. The J-9 is not a sharp lens, but definitely better at f2.0 than this

but i like it, not so bad.

**Lowell Goudge** · 03-01-2013, 05:04 AM

Originally posted by yusuf

I guess it will be your 75mm f1.8 (1.2 *1.5)

and probably Jupiter 9 @f2 is sharper than those images.

Actually if you consider the 58 mm front element of this thing, and for F1.2 the 50mm lens has a 41.6mm opening, there is enough glass to retain F1.2 at the new combined focal length

minahasa · 03-01-2013, 05:45 AM

Yes, the Jupiter MC is soft at F2. I don't have that lens, but every source I can find confirms that it is indeed soft wide open, due to lost of contrast. The older non-MC Jupiters is said to be sharper though. If you look more closely, with the adapter the center image is still sharp and retains original contrast of the lens. For portraiture this is just perfect.

Anyway, with only $15 extra for the adapter, it's just plain fun

I'm getting a 49 to 52 adapter ring, that way my FA 50/1.4 would surely becomes something else.

03-01-2013, 12:59 AM	#1
minahasa Veteran Member Join Date: Jan 2011 Location: Minahasa, North Celebes (Sulawesi) Photos: Albums Posts: 586	Okay, now I have a SMC K 75mm f1.2 SE Yay! I'm in possesion of the extremely ultra rare, unknown to the world, SMC K 75mm f1.2 SE 'Swirly Edition'. -okay I lied. It's a regular K 50/1.2 fitted with front-mounted 1.5x Kenko KNT-15 conversion glass.. I red it somewhere, and decided to give it a try. Do a bit of research, and this Kenko KNT-15 seems to have a good review. It turns 50mm to 75mm, correct me if I'm wrong, yet still preserves the 'speed' of the glass. It has a 52mm threads, so I tried fitting it to my 50/1.2 for a quick shot. Unlike using the rear-mount TC's that looses light, and jeopardizing quality, these kinds of extension seems 'safer' and to my eyes seemed with no real loss of quality. Without the extension: With the extension: Did I mention swirly? Oh yes, that's the interesting part. To my surprise, the extension seems to posses some kind of magic, it transforms 'regular' lenses into swirlies! Lucky me, I almost jump on that $160 Jupiter 85mm..

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03-01-2013, 02:07 AM	#2
yusuf Pentaxian Join Date: Nov 2008 Location: Palo Alto, CA Photos: Gallery Posts: 2,497	I guess it will be your 75mm f1.8 (1.2 *1.5) and probably Jupiter 9 @f2 is sharper than those images.

03-01-2013, 03:37 AM	#3
hoanpham Veteran Member Join Date: Nov 2009 Location: Strand Photos: Gallery \| Albums Posts: 1,366	Blasphemi. misuse of legacy glass Nice try. The J-9 is not a sharp lens, but definitely better at f2.0 than this but i like it, not so bad.

03-01-2013, 05:04 AM	#4
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,886	Originally posted by yusuf I guess it will be your 75mm f1.8 (1.2 *1.5) and probably Jupiter 9 @f2 is sharper than those images. Actually if you consider the 58 mm front element of this thing, and for F1.2 the 50mm lens has a 41.6mm opening, there is enough glass to retain F1.2 at the new combined focal length

03-01-2013, 05:45 AM	#5
minahasa Veteran Member Join Date: Jan 2011 Location: Minahasa, North Celebes (Sulawesi) Photos: Albums Posts: 586 Original Poster	Yes, the Jupiter MC is soft at F2. I don't have that lens, but every source I can find confirms that it is indeed soft wide open, due to lost of contrast. The older non-MC Jupiters is said to be sharper though. If you look more closely, with the adapter the center image is still sharp and retains original contrast of the lens. For portraiture this is just perfect. Anyway, with only $15 extra for the adapter, it's just plain fun I'm getting a 49 to 52 adapter ring, that way my FA 50/1.4 would surely becomes something else.

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