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05-17-2014, 01:26 AM   #1
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which long lens is the sharpest and lowest CA

Im looking at getting a 300mm ish lens to shoot shots of the moon with on my Q7 with adapter. There are three on the marketplace right now and was wondering if anyone knew which would be the sharpest and would be the best on avoiding CA or purple/yellow fringing. SMC takumar 300mm f/4, M 400mm f/5.6, or a vivitar 300mm f/5.6?

05-17-2014, 09:55 AM   #2
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SMC Takumar 300mm is probably the same as SMC K 300mm - so I would expect good sharpness and loads of CA from it. I find that old Meyer Optik 300mm lens is producing similarly sharp images with nearly nonexisting CA - you might want to check these threads below. I also had a brief period of ownership of a Vivitar 300 5.6 lens ( made by Tokina ) - it was a terrific lens very light and very competent IQ with average CA ( less than SMC K ) - also very portable - but I got rid of it when I got Meyer - the quality of images is not from not the same league, but Vivitar stopped down to f8 or more will produce superb shots - so as a cheaper option I would consider it as well.

>>-manntax-->

My first attempt to shoot the Moon :) ( all shots were done with Meyer Optik 300mm f4 lens )

Meyer-Optik Gorlitz 300mm f/4.0 Orestegor ( my review of this lens )

SMC Pentax 300mm F ( my review of this lens )

SMC Pentax K vs Meyer Orestegor 300mm ( my comaprison of both lenses - with sample shots)
05-17-2014, 12:25 PM   #3
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Oh ok is the M 400mm also CA prone?
05-17-2014, 12:28 PM   #4
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QuoteOriginally posted by shaolen Quote
Oh ok is the M 400mm also CA prone?
I am not sure never handled one - I advise to check the review of sample photos and see for yourself.

>>-manntax-->

05-18-2014, 03:29 AM   #5
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QuoteOriginally posted by shaolen Quote
Oh ok is the M 400mm also CA prone?
No question it has CA issues. It is a common complaint for this lens in the review area. It is also a lot of fun.

If you can get one at a good price go for it.

Tom G
05-19-2014, 09:44 AM   #6
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QuoteOriginally posted by 8540tomg Quote
No question it has CA issues. It is a common complaint for this lens in the review area. It is also a lot of fun.

If you can get one at a good price go for it.

Tom G


Do you think the CA would ruin a Moon shot though?
05-19-2014, 09:55 AM   #7
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QuoteOriginally posted by shaolen Quote
Do you think the CA would ruin a Moon shot though?
I dont think so, you can always convert to black and white if the CA is too much to fix in post.

Q7 is less demanding on adapted lenses than the Q is, and even though the magnification is less the sensor is better so you can crop some if needed.
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