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09-03-2013, 08:17 PM   #451
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HD is a improved replacement for SMC. SP coating is applied to the front element to keep the front surface free of dust and stains. They co-exist.

Aero Bright coating is not as durable as HD coating, so they are only used in the interior of the lenses. So far only the DA*55, DA*60-250 and DFA645 lenses have it.

09-03-2013, 11:35 PM   #452
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QuoteOriginally posted by lytrytyr Quote
Well, HD is supposedly more durable than the "best" coating.

I expect my lenses to stay consistent over many years of use,
so I'd prefer HD over Aero Bright.
I didn't mean it as to "blame" them for not using ABC. Using the second-best coating (described as "almost as good" as the more expensive ABC) makes sense, and with such lenses I doubt anyone could see the difference.
And yes, it appears to be visibly better than smc (if that multicoating they had in display was indeed smc, the difference is substantial).
09-04-2013, 03:09 AM   #453
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I am surprised that nobody (as far as I have read) mentioned the fact that "HD" is the way Hoya (Kenko Tokina in fact) are referring to their top-of-the-line filters (CIR-PL, Protector and UV filters):

HOYA | The Difference is Clear

Last edited by Mistral75; 09-04-2013 at 04:33 AM.
09-04-2013, 04:03 AM   #454
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Coincidence?
It has a different meaning, the coating is newer and developed by Pentax.

09-04-2013, 04:21 AM   #455
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QuoteOriginally posted by Kunzite Quote
Coincidence?
It has a different meaning, the coating is newer and developed by Pentax.
And Armani Eau Pour Homme is a fragrance developed by Giorgio Armani?

Not very likely. Giorgio Armani's designers have an exclusive agreement with one of world's largest manufacturers of perfumes from Europe; they choose samples, buy the fragrance wholesale, repack in Armani's bottles or perhaps, slightly alter fragrance formulas.

This HD coating was most probably developed by Hoya for its own optics division, and was passed down to Pentax Cameras and Optics to use it, or modify the formula for certain applications. As such, it was bought into Ricoh, and now officially started to be utilised.
09-04-2013, 04:37 AM   #456
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QuoteOriginally posted by Uluru Quote
(...)

This HD coating was most probably developed by Hoya for its own optics division, and was passed down to Pentax Cameras and Optics to use it, or modify the formula for certain applications. As such, it was bought into Ricoh, and now officially started to be utilised.
Or the other way around: developed by Pentax as a Hoya division but first used by Hoya for their own purposes and then transferred to Ricoh as a component of the Pentax Cameras and Optics business.
09-04-2013, 04:49 AM   #457
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QuoteOriginally posted by Mistral75 Quote
Or the other way around: developed by Pentax as a Hoya division but first used by Hoya for their own purposes and then transferred to Ricoh as a component of the Pentax Cameras and Optics business.
It could be. But considering that Pentax part did not have resources to develop even new lenses for its system to use new coating ... hmmm ...

Last edited by Uluru; 09-04-2013 at 05:18 AM.
09-04-2013, 05:41 AM   #458
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QuoteOriginally posted by Uluru Quote
This HD coating was most probably developed by Hoya for its own optics division, and was passed down to Pentax Cameras and Optics to use it, or modify the formula for certain applications. As such, it was bought into Ricoh, and now officially started to be utilised.
Since when was Hoya such an expert in coatings so they would have something, anything to give to Pentax? They didn't even made their "own" filters. Naturally, Pentax was the one to develop the ABC and the HD coatings - and that's what they're claiming themselves:
http://www.prweb.com/releases/2012/9/prweb9882828.htm

Pentax' R&D department wasn't reduced to zero, so they could do something even when no new DSLR product could be launched.

09-04-2013, 05:53 AM   #459
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Hmm. Interesting. You know what is also really interesting. HD Da 15/4 is cheaper than original one! I guess that someone mentioned this allready, but this might be a sign for me. I guess these lenses goes well together with K-5IIs. Now, My K-7 needs an replacement...I need bigger bank account...
09-04-2013, 06:21 AM   #460
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One supposes at Pentax pre-coporate disruptions optical engineers sourced in the lenses shop might have worjked on projects in some of the acquired medical imaging companies or in eyeglass lenses.

I wonder how many Pentax optical engineers, in addition to those simply made redundant and let go, were transferred to other Hoya divisions and retained by Hoya when Pentax was sold to Ricoh? It is entirely possible the cupboard of skilled engineers was quite bare by the time Ricoh rode into town. $125,000,000 isn't really very much money for a brand, some maunfacturing plants and a portfolio of patents. Maybe it represents how hollow Pentax really was, and why Pentax must only be a brand now becasue there really isn't enough left to be anything else..
09-04-2013, 06:31 AM   #461
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HD versions much more expensive in the UK

Here is a comparison from SRSMicrosystems:
smc HD
15 579 589
21 459 589
35 369 639
40 349 439
70 459 639

The 35 Macro is almost a double!
09-04-2013, 07:01 AM   #462
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QuoteOriginally posted by Kunzite Quote
Since when was Hoya such an expert in coatings so they would have something, anything to give to Pentax? They didn't even made their "own" filters. Naturally, Pentax was the one to develop the ABC ....
See the last link in particular:

Custom Coating Design from HOYA OPTICS: Leading supplier of advanced optical materials & components

Hi-Vision LongLife

Aero Bright Coating by HOYA CORPORATION - 1293712
09-04-2013, 07:27 AM - 1 Like   #463
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QuoteOriginally posted by davidsladek Quote
Here is a comparison from SRSMicrosystems:
smc HD
15 579 589
21 459 589
35 369 639
40 349 439
70 459 639

The 35 Macro is almost a double!
It's interesting that they have pitched the new level above the Fuji X-series ones since the X series appears to have similar build quality and attention to detail and must be a prominent competitor for the kind of buyer who is attracted to Pentax?

It's hard to work out what they are trying to do without a new body to which to attach these lenses. Pro gear? But they aren't. Leica mark II? But they aren't.

FWIW, a Nikon D600 and two of the best professional-level lenses Nikon make (24-70mm and 70-200mm f2.8) will not cost a great deal more than a K5IIs (or it's likely successor) and a set of the Limiteds. And both are up against some very stiff competition: an iPhone 5, a nice MacBook Pro with retina display and a Fuji X100s will together run to roughly the same as a set of Limiteds, for example. Add on a K series body and you can throw in an iPad or two. Few people have this kind of money anyway but for those who do it's becoming a bit hard to see where Pentax fits in with a compelling offer even when put up against world-class firms known for asking top dollar.

Last edited by mecrox; 09-04-2013 at 08:06 AM.
09-04-2013, 07:48 AM   #464
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Uluru: In 2009 Pentax was already dissolved into Hoya.
Developing coatings and surpassing Pentax at it are two different things.
09-04-2013, 08:10 AM   #465
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Somebody implied that Canon pretty much owns the red rings, but there are other red ringed lenses; besides, it's a way nicer red than Canon...
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