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01-21-2013, 10:31 PM   #1
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Kenko Pz-AF SHQ TC 1.5X vs Tamron-F 1.4X Pz-AF MC4

I have been using a Kenko SHQ TC 1.5X for a year. It is generally OK and its main issue is not sharp enough for me. I bought a used copy at $141.

Should it be deserved to buy a used copy of Tamron-F 1.4X PZ-AF MCF at $210?

Anyone can give me some idea about their IQ difference?

Thanks!
Stephen


Last edited by SKwan; 01-22-2013 at 07:13 AM.
01-22-2013, 01:42 AM   #2
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Perhaps this will help:
Miscellaneous Lenses for Pentax: Teleconverters (All Brands) - Pentax Lens Review Database
01-22-2013, 05:01 AM   #3
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QuoteOriginally posted by SKwan Quote
I have been using a Kenko SHQ TC 1.5X for a yeay. It is generally OK and its main issue is not sharp enough for me. I bought a used copy at $141.

Should it be deserved to buy a used copy of Tamron-F 1.4X PZ-AF MCF at $210?

Anyone can give me some idea about their IQ difference?

Thanks!
Stephen
You will have to test the two rigorously against each other under identical conditions to tell.

I cannot prove, but I have a strong suspicion that the Kenko and the Tamron share identical optics (perhaps apart from the BBAR coating).

I have the Kenko myself and have noticed and measured several times over that, in fact, it also only provides 1.4X extension. Anyway, I am actually quite happy with the performance and cannot really complain about neither auto focus nor sharpness.
01-22-2013, 06:25 AM   #4
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From anything I've heard, the Kenko PZ 1.5X is optically the same as the Tamron PZ 1.4X. I have a Kenko, and I have a Pentax 2X-S which I never use because the Kenko is much better, even cropped to 2X.

What lens are you using the Kenko with? Note that you need a pro quality lens to get good performance with a TC. I see a DA 55-300mm in your User Panel. From my testing, that lens is not good enough to carry a TC, you'll have better results from cropping than by adding a TC.

01-22-2013, 07:39 AM   #5
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QuoteOriginally posted by Stone G. Quote
I have the Kenko myself and have noticed and measured several times over that, in fact, it also only provides 1.4X extension.
Mine gives an extension of 1.53x, measuring the obtained scale with and without the TC, with the Tamron SP 2,5/90 and the Pentax DA* 4/300.
The image quality with the TC seems to me quite good (I don't have the Tamron).

Cheers - Klaus
01-22-2013, 08:12 AM   #6
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DA 55-300 plus Kenko SHQ TC1.5X
Above shows some photos taken with K5 + DA 55-300 + Kenko TC1.5X. Their IQ is OK but not sharp enough to my eyes. I am thinking if Tamron TC1.4 can reach 5% better than the Kenko!
01-22-2013, 08:19 AM   #7
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QuoteOriginally posted by Klaus Quote
Mine gives an extension of 1.53x, measuring the obtained scale with and without the TC, with the Tamron SP 2,5/90 and the Pentax DA* 4/300.
The image quality with the TC seems to me quite good (I don't have the Tamron).

Cheers - Klaus
Well, it may be a matter of allowable tolerances in the specs. I have tested and measured the effective FL with several lenses and findings are consistent.

(I trust we are talking about the same version).
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01-22-2013, 11:07 AM   #8
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QuoteOriginally posted by Stone G. Quote
Well, it may be a matter of allowable tolerances in the specs. I have tested and measured the effective FL with several lenses and findings are consistent.

(I trust we are talking about the same version).
Yes, it has the same text on it. Even so, it is possible that not all the time they sold this product there were the same lenses inside

Cheers - Klaus

01-22-2013, 01:50 PM   #9
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QuoteOriginally posted by SKwan Quote
DA 55-300 plus Kenko SHQ TC1.5X
Above shows some photos taken with K5 + DA 55-300 + Kenko TC1.5X. Their IQ is OK but not sharp enough to my eyes. I am thinking if Tamron TC1.4 can reach 5% better than the Kenko!
IMHO, to get decent IQ with a TC, you will need to use prime or higher quality tele zoom. I've tested both TCs with sigma 100-300 f/4 and FA 300 f/4.5, and there is no difference in sharpness I can see with either TCs. IQ loss is negligible.
01-22-2013, 02:46 PM   #10
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Pentax-FA 50mm f/1.4 and the Kenko 1.4X SHQ

QuoteOriginally posted by audiobomber Quote

-------- Note that you need a pro quality lens to get good performance with a TC. I see a DA 55-300mm in your User Panel. From my testing, that lens is not good enough to carry a TC, you'll have better results from cropping than by adding a TC.
QuoteOriginally posted by kesong Quote
IMHO, to get decent IQ with a TC, you will need to use prime or higher quality tele zoom. I've tested both TCs with sigma 100-300 f/4 and FA 300 f/4.5, and there is no difference in sharpness I can see with either TCs. IQ loss is negligible.
I very much agree. Now, take a look at the samples below. First my target (without TC) and then 100% non-resized crops of that target shot with the Pentax-FA without and with the TC. Images were shot in Av-mode using autofocus.

Any degradation in IQ? Well, I cannot see any.
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01-24-2013, 03:40 AM   #11
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I have both TCs and seem to use them interchangeably without really thinking about it, mainly on a DA*300 f4, and from time to time on a Sigma 500 f4.5 APO DG EX. I can't say that I have noticed any difference and have not come up with a preference for using one over the other.
01-25-2013, 06:21 AM   #12
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I finally bought the Tamron 1.4X. From my eyes, it has got a bit better of sharpness and contrast than the Kenko SHQ 1.5X.

The attached photos are:
1st one - 100% cropped from RAW ... Tamron 1.4X
2nd one - 100% cropped from RAW ... Kenko SHQ 1.5X
3rd one - 1728x1152 original JPG ... Tamron 1.4X
4th one - 1728x1152 original JPG ... Kenko SHQ 1.5X
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01-25-2013, 07:12 AM   #13
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QuoteOriginally posted by SKwan Quote
I finally bought the Tamron 1.4X. From my eyes, it has got a bit better of sharpness and contrast than the Kenko SHQ 1.5X.
I don't see enough difference there to matter. Try shooting the scene from the same subject distance, with the 55-300mm, no TC. Crop the image to the same FOV. Any time I've seen this done with a consumer zoom, the cropped image with the bare lens produces better results than adding a TC.
01-25-2013, 07:56 AM   #14
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QuoteOriginally posted by audiobomber Quote
the cropped image with the bare lens produces better results than adding a TC.
I have heard about this for many times but the statement is quite subject to what quality of TC is used. I have tried what you said for many times and cannot conclude as you experienced!
01-26-2013, 05:17 AM   #15
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DA 55-300 plus Tamron TC1.4X

Above link shows some photos taken with K5 + DA 55-300 + Tamron TC1.4X. As expected, the photos are a bit sharper than with Kenko SHQ TC1.5X.

I have found the apperance and magnification of Tamron is actually same as Kenko's one!
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