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12-31-2007, 04:55 PM   #1
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DA* 50-135 works well with 1.4X-S

On a whim, today, I took this shot among others. The shot was taken with the k10d, DA* 50-135 and my SMCP-A 1.4X-S converter about 2 m/6.5 ft from my book case. Pentax Photo Browser gives the following EXIF data:

A lens
200 mm -- from the shake reduction, I think.
1/180 @ f/4.0
ISO 400
auto flash
manual focus
Shake reduction Yes

I expected much worse from the combination than I got. I am actually very pleased with the results. This is a very useful option for me. The 1.4X weighs less than the A 70-210/4, and I think the quality of the combination is much better. The bottom right corner 100% crop is below the resized original image.



And the crop from the bottom right corner


12-31-2007, 05:12 PM   #2
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Looks like a winning combo Albert, and even when you lose a stop it still faster than either the 70-210 or the DA 50-200

NaCl(my kenko 1.5 just arrived yesterday, thanks for reminding me to take that baby out tomorrow)H2O
12-31-2007, 07:28 PM   #3
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QuoteOriginally posted by NaClH2O Quote
Looks like a winning combo Albert, and even when you lose a stop it still faster than either the 70-210 or the DA 50-200

NaCl(my kenko 1.5 just arrived yesterday, thanks for reminding me to take that baby out tomorrow)H2O
The combo is the same speed as the A 70-210, f/4 all the way. The A is not as optically good as the combo, though. I will keep it until I can buy better because it becomes a 100-300/5.6 with better IQ than the 100-300.
12-31-2007, 08:43 PM   #4
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The images look great in deed.

I have 2X S tele and it is also a great performer.

But there will be no long SDM, kind of better getting A 200 f4

12-31-2007, 09:19 PM   #5
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I've used my 1.4X-S with my FA* 400mm f/5.6 with good results. It's a great teleconverter, especially when paired with a * lens.
01-01-2008, 01:04 AM   #6
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QuoteOriginally posted by igowerf Quote
I've used my 1.4X-S with my FA* 400mm f/5.6 with good results. It's a great teleconverter, especially when paired with a * lens.
I have the M 400mm f/5.6, and it vignettes. I am surprised that it works well on the 400 - it's rated for lenses less than 300mm. I have to use the S on the M 400 because the throat won't accept the projection on the 1.4X-L.
01-01-2008, 01:15 AM   #7
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I have used 1.4X L on A* 300 f2.8, the image quality stays the same even I couple it with F 1.7X tele as well.

L teleconverters are probably the best I have seen
01-01-2008, 02:05 AM   #8
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QuoteOriginally posted by Canada_Rockies Quote
I have the M 400mm f/5.6, and it vignettes. I am surprised that it works well on the 400 - it's rated for lenses less than 300mm. I have to use the S on the M 400 because the throat won't accept the projection on the 1.4X-L.
The 1.4X-S is unusable to either A or M 400mm lens according to Pentax converter manual.
I have the said manual and could post up here if anybody requires.

01-01-2008, 10:50 AM   #9
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QuoteOriginally posted by Canada_Rockies Quote
I have the M 400mm f/5.6, and it vignettes. I am surprised that it works well on the 400 - it's rated for lenses less than 300mm. I have to use the S on the M 400 because the throat won't accept the projection on the 1.4X-L.
Well, I mainly used that combo for taking pictures of the moon, so vignetting against the dark night sky isn't a problem. I don't think I've ever tried the combo out in daylight, but I'll test it out when I get home.

I've tried to get a 1.4X-L a couple times on eBay, but they're rare and pretty expensive. Anyone want to trade their -L for my -S?
01-01-2008, 01:19 PM   #10
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Hmm,
is this one any good?
Kenko | 1.5x DG AF Tele-Converter for Pentax AF | K15AFDGPK
01-01-2008, 05:35 PM   #11
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i was disappointed with the results with mine and the 70-210. it's great on any prime ..
01-01-2008, 10:02 PM   #12
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QuoteOriginally posted by igowerf Quote
Well, I mainly used that combo for taking pictures of the moon, so vignetting against the dark night sky isn't a problem. I don't think I've ever tried the combo out in daylight, but I'll test it out when I get home.

I've tried to get a 1.4X-L a couple times on eBay, but they're rare and pretty expensive. Anyone want to trade their -L for my -S?
Watch out - the 1.4X-L will not mount on the M 400/5.6. The lens barrel is not large enough diameter. Cost me a restocking charge to find that out! Assuming prints are 8x10, 16x20, 11x14, the corners are cropped out anyway, so that's my work around.
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