Pentax K-7 "peaking" level for manual focus

SkipperRi · 07-18-2013, 10:05 AM

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Hello everyone,

I got to test Rokinon 500 mm lens. When you connect with the Pentax K-7 (T2-adapter Pentax), everything is fine. I set it to manual focus, but I have no "peaking" (little red square on object which is in focus) function for detecting the focus. With Cosina lens 70-210 (MF), peaking is okay.

Do you have any idea what this is about?

Thanks in advance.

**crewl1** · 07-18-2013, 10:07 AM

Is this a fixed aperture mirror lens? Perhaps the aperture is not fast enough for focus confirmation?

SkipperRi · 07-18-2013, 10:11 AM

Originally posted by crewl1

Is this a fixed aperture mirror lens? Perhaps the aperture is not fast enough for focus confirmation?

This is that lens.
Dear crewl1. I think you got a point. Is it possible to "correct" that in some way?
Thank you for the super quick answer.

**boriscleto** · 07-18-2013, 10:32 AM

A f/8 lens is a f/8 lens. Put the TC on it and it is a f/16 lens...

If the light is good enough for you to focus you shouldn't have too much of a problem. The DoF you see in the viewfinder is the DoF you are going to get in the photo, a spit image focusing screen won't help because the split image would be blacked out...

SkipperRi · 07-18-2013, 10:36 AM

Boris,

Thanks for the answer. Yes, I get it now.

Adam · 07-18-2013, 11:44 AM

Originally posted by SkipperRi

Hello everyone,

I got to test Rokinon 500 mm lens. When you connect with the Pentax K-7 (T2-adapter Pentax), everything is fine. I set it to manual focus, but I have no "peaking" (little red square on object which is in focus) function for detecting the focus. With Cosina lens 70-210 (MF), peaking is okay.

Do you have any idea what this is about?

Thanks in advance.

That's not focus peaking, btw. Focus peaking is when sharp edges are highlighted on the screen

SkipperRi · 07-18-2013, 11:48 AM

Originally posted by Adam

That's not focus peaking, btw. Focus peaking is when sharp edges are highlighted on the screen

Right.

What's the name of this function?

Adam · 07-18-2013, 11:58 AM

Originally posted by SkipperRi

Right.

What's the name of this function?

AF/focus confirmation

SkipperRi · 07-18-2013, 12:00 PM

Originally posted by Adam

AF/focus confirmation

Thanks Adam. BTW, does K-7 have peaking at all?

**boriscleto** · 07-18-2013, 01:00 PM

Originally posted by SkipperRi

Thanks Adam. BTW, does K-7 have peaking at all?

No, only the Q/7/10, K-01 & K-30/50/500 have focus peaking. There has been speculation that the Prime II processor in the K-7/5/5II/5IIs isn't fast enough to handle focus peaking.

SkipperRi · 07-18-2013, 01:06 PM

Originally posted by boriscleto

No, only the Q/7/10, K-01 & K-30/50/500 have focus peaking. There has been speculation that the Prime II processor in the K-7/5/5II/5IIs isn't fast enough to handle focus peaking.

Hm, isn't that a little bit strange, boris? After all, these are flagship models, everyone in his era. Also, that are great cameras, but with too slow processor for peaking...

**boriscleto** · 07-18-2013, 01:45 PM

Originally posted by SkipperRi

Hm, isn't that a little bit strange, boris? After all, these are flagship models, everyone in his era. Also, that are great cameras, but with too slow processor for peaking...

Prime II is an older processor than the Prime M in the lower end models. But Prime II can handle 14-bit RAW files (K-5 & later) & has a higher frame rate than the lower end models (bigger buffer). In the past, if the hardware supported it, Pentax would add features through a firmware update (the Q got focus peaking with the 1.10 update).

07-18-2013, 10:05 AM	#1
SkipperRi Veteran Member Join Date: Jul 2013 Location: Rijeka Photos: Gallery \| Albums Posts: 595	Pentax K-7 "peaking" level for manual focus Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here. Hello everyone, I got to test Rokinon 500 mm lens. When you connect with the Pentax K-7 (T2-adapter Pentax), everything is fine. I set it to manual focus, but I have no "peaking" (little red square on object which is in focus) function for detecting the focus. With Cosina lens 70-210 (MF), peaking is okay. Do you have any idea what this is about? Thanks in advance.

07-18-2013, 10:11 AM	#3
SkipperRi Veteran Member Join Date: Jul 2013 Location: Rijeka Photos: Gallery \| Albums Posts: 595 Original Poster	Originally posted by crewl1 Is this a fixed aperture mirror lens? Perhaps the aperture is not fast enough for focus confirmation? This is that lens. Dear crewl1. I think you got a point. Is it possible to "correct" that in some way? Thank you for the super quick answer. Last edited by SkipperRi; 07-18-2013 at 10:28 AM.

07-18-2013, 11:44 AM	#6
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Originally posted by SkipperRi Hello everyone, I got to test Rokinon 500 mm lens. When you connect with the Pentax K-7 (T2-adapter Pentax), everything is fine. I set it to manual focus, but I have no "peaking" (little red square on object which is in focus) function for detecting the focus. With Cosina lens 70-210 (MF), peaking is okay. Do you have any idea what this is about? Thanks in advance. That's not focus peaking, btw. Focus peaking is when sharp edges are highlighted on the screen Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

07-18-2013, 11:58 AM	#8
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Originally posted by SkipperRi Right. What's the name of this function? AF/focus confirmation Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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07-18-2013, 10:07 AM	#2
crewl1 Site Supporter Join Date: Jul 2010 Location: Los Angeles, CA Photos: Gallery \| Albums Posts: 9,807	Is this a fixed aperture mirror lens? Perhaps the aperture is not fast enough for focus confirmation?

07-18-2013, 10:32 AM	#4
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	A f/8 lens is a f/8 lens. Put the TC on it and it is a f/16 lens... If the light is good enough for you to focus you shouldn't have too much of a problem. The DoF you see in the viewfinder is the DoF you are going to get in the photo, a spit image focusing screen won't help because the split image would be blacked out...

07-18-2013, 10:36 AM	#5
SkipperRi Veteran Member Join Date: Jul 2013 Location: Rijeka Photos: Gallery \| Albums Posts: 595 Original Poster	Boris, Thanks for the answer. Yes, I get it now.

07-18-2013, 11:48 AM	#7
SkipperRi Veteran Member Join Date: Jul 2013 Location: Rijeka Photos: Gallery \| Albums Posts: 595 Original Poster	Originally posted by Adam That's not focus peaking, btw. Focus peaking is when sharp edges are highlighted on the screen Right. What's the name of this function?

07-18-2013, 12:00 PM	#9
SkipperRi Veteran Member Join Date: Jul 2013 Location: Rijeka Photos: Gallery \| Albums Posts: 595 Original Poster	Originally posted by Adam AF/focus confirmation Thanks Adam. BTW, does K-7 have peaking at all?

07-18-2013, 01:00 PM	#10
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Originally posted by SkipperRi Thanks Adam. BTW, does K-7 have peaking at all? No, only the Q/7/10, K-01 & K-30/50/500 have focus peaking. There has been speculation that the Prime II processor in the K-7/5/5II/5IIs isn't fast enough to handle focus peaking.

07-18-2013, 01:06 PM	#11
SkipperRi Veteran Member Join Date: Jul 2013 Location: Rijeka Photos: Gallery \| Albums Posts: 595 Original Poster	Originally posted by boriscleto No, only the Q/7/10, K-01 & K-30/50/500 have focus peaking. There has been speculation that the Prime II processor in the K-7/5/5II/5IIs isn't fast enough to handle focus peaking. Hm, isn't that a little bit strange, boris? After all, these are flagship models, everyone in his era. Also, that are great cameras, but with too slow processor for peaking...

07-18-2013, 01:45 PM	#12
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Originally posted by SkipperRi Hm, isn't that a little bit strange, boris? After all, these are flagship models, everyone in his era. Also, that are great cameras, but with too slow processor for peaking... Prime II is an older processor than the Prime M in the lower end models. But Prime II can handle 14-bit RAW files (K-5 & later) & has a higher frame rate than the lower end models (bigger buffer). In the past, if the hardware supported it, Pentax would add features through a firmware update (the Q got focus peaking with the 1.10 update).