Win a Pentax Limited lens and more - enter in our 2023 end of year giveaway!

**UncleVanya** · 06-26-2023, 11:55 AM

Originally posted by bdery

I believe it's a requirement of the Sony system, not the Pentax system.

I think you are correct.

sculptor666 · 08-22-2023, 09:51 AM - **2 Likes**

the new DFA AW 100 macro isn't on the list of supported lenses, but it works just fine. got my monster adapter in the mail today.

**UncleVanya** · 08-22-2023, 10:09 AM

Originally posted by sculptor666

the new DFA AW 100 macro isn't on the list of supported lenses, but it works just fine. got my monster adapter in the mail today.

Good to know. Weird things have sometimes happened with “similar” lenses. The FA 50/1.4 even had versions that had internal differences that caused issues for some users of the adapter.

bdery · 08-23-2023, 05:09 AM

Originally posted by UncleVanya

Good to know. Weird things have sometimes happened with “similar” lenses. The FA 50/1.4 even had versions that had internal differences that caused issues for some users of the adapter.

Indeed, especially considering that the internals have definitely been updated between the SMC and HD versions.

sculptor666 · 08-23-2023, 03:50 PM

it also works on extension tubes on the sony body... no reason it wouldn't, but tried it out with the 100 today.

body > ext tubes > monster adapter > k-mount lens

**UncleVanya** · 08-23-2023, 04:23 PM

Originally posted by sculptor666

it also works on extension tubes on the sony body... no reason it wouldn't, but tried it out with the 100 today.

body > ext tubes > monster adapter > k-mount lens

Since there's no modification of the data flow I would expect this. Good to confirm it however. I assume the tubes are the kind that maintain data connections and focus?

sculptor666 · 08-24-2023, 09:04 AM - **1 Like**

Originally posted by UncleVanya

Since there's no modification of the data flow I would expect this. Good to confirm it however. I assume the tubes are the kind that maintain data connections and focus?

yep, any ol' e-mount extension tubes... i haven't seen any that don't have contacts. no vignetting on the 100, haven't tried others yet.

**UncleVanya** · 08-24-2023, 10:18 AM - **1 Like**

Originally posted by sculptor666

yep, any ol' e-mount extension tubes... i haven't seen any that don't have contacts. no vignetting on the 100, haven't tried others yet.

Ack! The tubes could be on either side of the adapter. I was assuming on the k mount side and not the e Mount side.

xmeda · 11-15-2023, 03:40 PM

Originally posted by UncleVanya

I think you are correct.

Can you be more specific?

**UncleVanya** · 11-15-2023, 08:41 PM

Originally posted by xmeda

Can you be more specific?

Mauybe? The person I was responding to might be able to expand on it but here's the link to what I responded to: Monster Adapter Magic Ring Pentax K Lens to Sony E-Mount Camera Adapter - Page 14 - PentaxForums.com

Essentially, as I understand things the Sony system needs much more info than the Pentax compatible lenses provide - so the adapter has to make up some data to make the camera think these are valid E mount lenses. Things are so specific that some lenses have not been possible to create profiles to make them work. The D FA 24-70 and D FA 15-30 come to mind. It's not a simple task apparently - unlike what it would seem.

bdery · 11-16-2023, 06:30 AM

Originally posted by UncleVanya

Essentially, as I understand things the Sony system needs much more info than the Pentax compatible lenses provide - so the adapter has to make up some data to make the camera think these are valid E mount lenses. Things are so specific that some lenses have not been possible to create profiles to make them work. The D FA 24-70 and D FA 15-30 come to mind. It's not a simple task apparently - unlike what it would seem.

That is correct. The Sony system is "open", luckily, meaning that what the lens needs to supply is known, but Pentax lenses do not supply all this info by themselves, so the makers of the adapter need to embed this extra information for each lens (which in turn means "learning" all that information). Then the adapter needs to recognize the lens and supply the info accordingly.

**Mikesul** · 11-16-2023, 07:36 AM

Any idea what that extra information is?

**UncleVanya** · 11-16-2023, 05:32 PM

Originally posted by Mikesul

Any idea what that extra information is?

I am pretty sure more precise focusing distance is part of it. Don’t ask me how they infer that! I don’t honestly know the designer used to be more accessible to me but he stopped responding.

willpc · 11-16-2023, 05:56 PM

Honestly seems too expensive. Like if you have an extensive collection of Pentax glass and really need to shoot with them on your Sony and need the auto focus, then I guess it seems worth it. But I can't imagine many people would want this at the price point.

**UncleVanya** · 11-16-2023, 06:13 PM - **1 Like**

Originally posted by willpc

Honestly seems too expensive. Like if you have an extensive collection of Pentax glass and really need to shoot with them on your Sony and need the auto focus, then I guess it seems worth it. But I can't imagine many people would want this at the price point.

And yet it sells. And I’ve been asked if mine was available by more than one user.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Monster LA-KE Pentax to Sony AF adapter $479	jhaji	Pentax Price Watch	11	11-02-2021 11:25 AM
Pentax K mount lens to Sony/Minolta A Mount Adapter	Theov39	Pentax SLR Lens Discussion	8	06-07-2021 06:03 AM
Lensbaby Composer Pro - Modifying Mount from Sony Lens to K-Mount? Or Adapter?	Gerard_Dirks	Pentax SLR Lens Discussion	5	04-07-2021 04:03 AM
For Sale - Sold: Pentax OEM M42 screw mount to K-mount adapter ring	igowerf	Sold Items	3	11-10-2020 05:48 AM

06-26-2023, 11:55 AM	#211
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 26,968	Originally posted by bdery I believe it's a requirement of the Sony system, not the Pentax system. I think you are correct.

08-22-2023, 09:51 AM - 2 Likes	#212
sculptor666 Pentaxian Join Date: Dec 2013 Location: PA Photos: Gallery Posts: 669	the new DFA AW 100 macro isn't on the list of supported lenses, but it works just fine. got my monster adapter in the mail today.

08-22-2023, 10:09 AM	#213
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 26,968	Originally posted by sculptor666 the new DFA AW 100 macro isn't on the list of supported lenses, but it works just fine. got my monster adapter in the mail today. Good to know. Weird things have sometimes happened with “similar” lenses. The FA 50/1.4 even had versions that had internal differences that caused issues for some users of the adapter.

08-23-2023, 05:09 AM	#214
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,283	Originally posted by UncleVanya Good to know. Weird things have sometimes happened with “similar” lenses. The FA 50/1.4 even had versions that had internal differences that caused issues for some users of the adapter. Indeed, especially considering that the internals have definitely been updated between the SMC and HD versions.

08-23-2023, 03:50 PM	#215
sculptor666 Pentaxian Join Date: Dec 2013 Location: PA Photos: Gallery Posts: 669	it also works on extension tubes on the sony body... no reason it wouldn't, but tried it out with the 100 today. body > ext tubes > monster adapter > k-mount lens

08-23-2023, 04:23 PM	#216
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 26,968	Originally posted by sculptor666 it also works on extension tubes on the sony body... no reason it wouldn't, but tried it out with the 100 today. body > ext tubes > monster adapter > k-mount lens Since there's no modification of the data flow I would expect this. Good to confirm it however. I assume the tubes are the kind that maintain data connections and focus?

08-24-2023, 09:04 AM - 1 Like	#217
sculptor666 Pentaxian Join Date: Dec 2013 Location: PA Photos: Gallery Posts: 669	Originally posted by UncleVanya Since there's no modification of the data flow I would expect this. Good to confirm it however. I assume the tubes are the kind that maintain data connections and focus? yep, any ol' e-mount extension tubes... i haven't seen any that don't have contacts. no vignetting on the 100, haven't tried others yet.

08-24-2023, 10:18 AM - 1 Like	#218
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 26,968	Originally posted by sculptor666 yep, any ol' e-mount extension tubes... i haven't seen any that don't have contacts. no vignetting on the 100, haven't tried others yet. Ack! The tubes could be on either side of the adapter. I was assuming on the k mount side and not the e Mount side.

11-15-2023, 03:40 PM	#219
xmeda Senior Member Join Date: Feb 2011 Location: Brno Posts: 295	Originally posted by UncleVanya I think you are correct. Can you be more specific?

11-15-2023, 08:41 PM	#220
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 26,968	Originally posted by xmeda Can you be more specific? Mauybe? The person I was responding to might be able to expand on it but here's the link to what I responded to: Monster Adapter Magic Ring Pentax K Lens to Sony E-Mount Camera Adapter - Page 14 - PentaxForums.com Essentially, as I understand things the Sony system needs much more info than the Pentax compatible lenses provide - so the adapter has to make up some data to make the camera think these are valid E mount lenses. Things are so specific that some lenses have not been possible to create profiles to make them work. The D FA 24-70 and D FA 15-30 come to mind. It's not a simple task apparently - unlike what it would seem.

Thread Tools	Search this Thread
	Search this Thread: Advanced Search

11-16-2023, 06:30 AM	#221
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,283	Originally posted by UncleVanya Essentially, as I understand things the Sony system needs much more info than the Pentax compatible lenses provide - so the adapter has to make up some data to make the camera think these are valid E mount lenses. Things are so specific that some lenses have not been possible to create profiles to make them work. The D FA 24-70 and D FA 15-30 come to mind. It's not a simple task apparently - unlike what it would seem. That is correct. The Sony system is "open", luckily, meaning that what the lens needs to supply is known, but Pentax lenses do not supply all this info by themselves, so the makers of the adapter need to embed this extra information for each lens (which in turn means "learning" all that information). Then the adapter needs to recognize the lens and supply the info accordingly.

11-16-2023, 07:36 AM	#222
Mikesul Loyal Site Supporter Join Date: Sep 2009 Location: Phoenix, AZ Posts: 7,441 Original Poster	Any idea what that extra information is?

11-16-2023, 05:32 PM	#223
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 26,968	Originally posted by Mikesul Any idea what that extra information is? I am pretty sure more precise focusing distance is part of it. Don’t ask me how they infer that! I don’t honestly know the designer used to be more accessible to me but he stopped responding.

11-16-2023, 05:56 PM	#224
willpc Forum Member Join Date: Oct 2023 Location: Southern California Posts: 55	Honestly seems too expensive. Like if you have an extensive collection of Pentax glass and really need to shoot with them on your Sony and need the auto focus, then I guess it seems worth it. But I can't imagine many people would want this at the price point.

11-16-2023, 06:13 PM - 1 Like	#225
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 26,968	Originally posted by willpc Honestly seems too expensive. Like if you have an extensive collection of Pentax glass and really need to shoot with them on your Sony and need the auto focus, then I guess it seems worth it. But I can't imagine many people would want this at the price point. And yet it sells. And I’ve been asked if mine was available by more than one user.