HD Pentax‐D FA Macro 100mm f/2.8 ED AW

Sandy Hancock · 10-19-2022, 09:41 PM - **2 Likes**

Originally posted by disasterfilm

That sexy silver change any minds?

I may have changed my mind about not being in the first wave of purchasers.
My silver DFA21, FA31, FA43 and FA77 might need this stablemate....

Mistral75 · 10-19-2022, 10:17 PM - **13 Likes**

Originally posted by lemono

In fact, it can be determined that the optical design has not changed. Before, Pentax did not mark the ED, but now it does. That ED has always existed.
The officially introduced dispersion improvement is most likely based on the improvement of tolerance control. It can be referred to the dispersion gap between engineering samples and mass products of DFA*50.
This improvement is AW and coating.

Please don't spread alternative facts.

1. ED means Extra-low Dispersion glass. It's a standard naming. It has nothing to do with any improvement in tolerance control.

2. The smc WR version has 9 elements in 8 groups. None of its lens elements are made of ED glass or glass with anomalous partial dispersion. How can I be so affirmative? Because of the corresponding patent and the examples it includes http://www.freepatentsonline.com/4770516.pdf

3. The HD AW version announced today has 10 elements in 8 groups, of which one element made of ED (Extra-low Dispersion) glass and two elements made of glass with anomalous partial dispersion.

Those are two different optical designs.

JPT · 10-19-2022, 10:55 PM

I think this must be the fastest ever delivery of a roadmapped lens for Pentax. Less than three months from development announcement to release?

Mistral75 · 10-19-2022, 11:02 PM

Originally posted by JPT

I think this must be the fastest ever delivery of a roadmapped lens for Pentax. Less than three months from development announcement to release?

First shown (Zoom videoconference) on 31 July, roadmapped on 1 August, available on 28 October (silver) / 18 November (black).

JPT · 10-19-2022, 11:13 PM - **3 Likes**

Originally posted by Mistral75

First shown (Zoom videoconference) on 31 July, roadmapped on 1 August, available on 28 October (silver) / 18 November (black).

Thanks. I knew I could count on you to provide the dates! You’re like Siri but actually useful.

Mistral75 · 10-19-2022, 11:15 PM - **3 Likes**

...and I react to written commands, not vocal ones.

**Serkevan** · 10-20-2022, 01:03 AM - **2 Likes**

Why exactly did they have to go and make it silver? I just dropped off my Tamron 90/2.5 to have its screwdrive looked at!
Be still my wallet.

Mistral75 · 10-20-2022, 02:24 AM

€699,99 in the eurozone.

BarneyL · 10-20-2022, 02:32 AM

Anybody knows how this "FREE (Fixed Rear Element Extension)" autofocus works? Also is the lens KAF4?

**Serkevan** · 10-20-2022, 02:53 AM

Originally posted by BarneyL

Anybody knows how this "FREE (Fixed Rear Element Extension)" autofocus works? Also is the lens KAF4?

Same as the FA 77mm. It does not move the rear element while focusing. Dunno about the mount.

Mistral75 · 10-20-2022, 03:19 AM

Originally posted by BarneyL

(...) is the lens KAF4?

Originally posted by Serkevan

(...) Dunno about the mount.

KAF mount, neither KAF3 not KAF4 since autofocus is screw-driven.

**JensE** · 10-20-2022, 03:20 AM

Originally posted by BarneyL

Anybody knows how this "FREE (Fixed Rear Element Extension)" autofocus works?

Moving front and internal lens groups. The 100/2.8 macros have used a FREE design since the Pentax-A 100/2.8. The specifications don't mention an in-lens motor, nor would there be enough space, so it seems to continue to use classic screwdriver coupling.

Originally posted by BarneyL

Also is the lens KAF4?

The product images show an aperture lever, so that seems to be unchanged as well.

If the rendering is indeed as nice as the sample images suggest, I may be able to go down from three to two longish (100mm+) macros. I'm especially curious how the foreground blur will look like - my least favorite aspect of the DFA100WR.

nonpigliounoshoot · 10-20-2022, 03:54 AM

Good job for me.. but in hypothesis it could have an internal engine such as the 20-40 limited?

D1N0 · 10-20-2022, 05:50 AM - **1 Like**

Well at least it is still very affordable Compared to Canon or Nikon SLR 100/105mm macro's. New coatings, improved optics and better weather sealing. A total new design would probably have been well over a thousand.

**JensE** · 10-20-2022, 07:28 AM

Originally posted by nonpigliounoshoot

Good job for me.. but in hypothesis it could have an internal engine such as the 20-40 limited?

Comparing HD Pentax-DA 20-40mm F2.8-4 Limited DC WR Lens Photo - Pentax Lens Reviews & Lens Database and http://kmp.pentaxians.eu/wp-content/uploads/bojidar/lenses/primes/_optics/100f2.8-Macro-iii.gif (DFA100WR) may give you an idea on why that would likely be a very different task. A lot bigger glass to be moved over a lot longer distances. I am very happy that the new lens stays as compact as the current, a very unique advantage. Even the current MF 3rd party offerings are a lot bigger an heavier (Tamron's 90mm was probably the closest).

10-19-2022, 10:17 PM - 13 Likes	#32
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527 Original Poster	Originally posted by lemono In fact, it can be determined that the optical design has not changed. Before, Pentax did not mark the ED, but now it does. That ED has always existed. The officially introduced dispersion improvement is most likely based on the improvement of tolerance control. It can be referred to the dispersion gap between engineering samples and mass products of DFA50. This improvement is AW and coating. Please don't spread alternative facts. 1. ED means Extra-low Dispersion glass. It's a standard naming. It has nothing to do with any improvement in tolerance control. 2. The smc WR version has 9 elements in 8 groups. None of its lens elements are made of ED glass or glass with anomalous partial dispersion. How can I be so affirmative? Because of the corresponding patent and the examples it includes http://www.freepatentsonline.com/4770516.pdf 3. The HD AW version announced today has 10 elements in 8 groups, of which one element made of ED (Extra-low Dispersion) glass and two elements made of glass with anomalous partial dispersion. Those are two different optical designs.* Last edited by Mistral75; 10-19-2022 at 10:45 PM.

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10-19-2022, 09:41 PM - 2 Likes	#31
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,275	Originally posted by disasterfilm That sexy silver change any minds? I may have changed my mind about not being in the first wave of purchasers. My silver DFA21, FA31, FA43 and FA77 might need this stablemate....

10-19-2022, 10:55 PM	#33
JPT Pentaxian Join Date: Jan 2012 Location: Tokyo Photos: Gallery Posts: 2,821	I think this must be the fastest ever delivery of a roadmapped lens for Pentax. Less than three months from development announcement to release?

10-19-2022, 11:02 PM	#34
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527 Original Poster	Originally posted by JPT I think this must be the fastest ever delivery of a roadmapped lens for Pentax. Less than three months from development announcement to release? First shown (Zoom videoconference) on 31 July, roadmapped on 1 August, available on 28 October (silver) / 18 November (black).

10-19-2022, 11:13 PM - 3 Likes	#35
JPT Pentaxian Join Date: Jan 2012 Location: Tokyo Photos: Gallery Posts: 2,821	Originally posted by Mistral75 First shown (Zoom videoconference) on 31 July, roadmapped on 1 August, available on 28 October (silver) / 18 November (black). Thanks. I knew I could count on you to provide the dates! You’re like Siri but actually useful.

10-19-2022, 11:15 PM - 3 Likes	#36
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527 Original Poster	...and I react to written commands, not vocal ones.

10-20-2022, 01:03 AM - 2 Likes	#37
Serkevan Site Supporter Join Date: May 2019 Photos: Albums Posts: 5,976	Why exactly did they have to go and make it silver? I just dropped off my Tamron 90/2.5 to have its screwdrive looked at! Be still my wallet.

10-20-2022, 02:24 AM	#38
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527 Original Poster	€699,99 in the eurozone.

10-20-2022, 02:32 AM	#39
BarneyL Pentaxian Join Date: Feb 2017 Posts: 899	Anybody knows how this "FREE (Fixed Rear Element Extension)" autofocus works? Also is the lens KAF4?

10-20-2022, 02:53 AM	#40
Serkevan Site Supporter Join Date: May 2019 Photos: Albums Posts: 5,976	Originally posted by BarneyL Anybody knows how this "FREE (Fixed Rear Element Extension)" autofocus works? Also is the lens KAF4? Same as the FA 77mm. It does not move the rear element while focusing. Dunno about the mount.

10-20-2022, 03:19 AM	#41
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527 Original Poster	Originally posted by BarneyL (...) is the lens KAF4? Originally posted by Serkevan (...) Dunno about the mount. KAF mount, neither KAF3 not KAF4 since autofocus is screw-driven.

10-20-2022, 03:20 AM	#42
JensE Site Supporter Join Date: Dec 2015 Location: Leipzig Photos: Gallery \| Albums Posts: 1,975	Originally posted by BarneyL Anybody knows how this "FREE (Fixed Rear Element Extension)" autofocus works? Moving front and internal lens groups. The 100/2.8 macros have used a FREE design since the Pentax-A 100/2.8. The specifications don't mention an in-lens motor, nor would there be enough space, so it seems to continue to use classic screwdriver coupling. Originally posted by BarneyL Also is the lens KAF4? The product images show an aperture lever, so that seems to be unchanged as well. If the rendering is indeed as nice as the sample images suggest, I may be able to go down from three to two longish (100mm+) macros. I'm especially curious how the foreground blur will look like - my least favorite aspect of the DFA100WR.

10-20-2022, 03:54 AM	#43
nonpigliounoshoot Pentaxian Join Date: Oct 2019 Posts: 735	Good job for me.. but in hypothesis it could have an internal engine such as the 20-40 limited?

10-20-2022, 05:50 AM - 1 Like	#44
D1N0 Pentaxian Join Date: May 2012 Location: --- Photos: Gallery Posts: 6,802	Well at least it is still very affordable Compared to Canon or Nikon SLR 100/105mm macro's. New coatings, improved optics and better weather sealing. A total new design would probably have been well over a thousand.

10-20-2022, 07:28 AM	#45
JensE Site Supporter Join Date: Dec 2015 Location: Leipzig Photos: Gallery \| Albums Posts: 1,975	Originally posted by nonpigliounoshoot Good job for me.. but in hypothesis it could have an internal engine such as the 20-40 limited? Comparing HD Pentax-DA 20-40mm F2.8-4 Limited DC WR Lens Photo - Pentax Lens Reviews & Lens Database and http://kmp.pentaxians.eu/wp-content/uploads/bojidar/lenses/primes/_optics/100f2.8-Macro-iii.gif (DFA100WR) may give you an idea on why that would likely be a very different task. A lot bigger glass to be moved over a lot longer distances. I am very happy that the new lens stays as compact as the current, a very unique advantage. Even the current MF 3rd party offerings are a lot bigger an heavier (Tamron's 90mm was probably the closest).