K-3 II and Sigma 600mm Mirror Lens

Rickster · 06-16-2016, 07:18 AM

When I power down the K-3 II and attach the Sigma 600mm then power up, I do not get the focal length adjustment screen. I also can not adjust shutter speed.

I've attached a capture of the Menu screen.

Note: When I use my Samyang 8mm I DO get a focal length adjustment screen and CAN adjust shutter speed. I can also attach the Sigma to my K30 and it works fine. In the attached image the "F ---" in the bottom blank box is missing as it blinks and I did not capture it.

Am I missing something here???

Attached Images

stevebrot · 06-16-2016, 08:20 AM - **1 Like**

If your lens does not have the "A" contacts on the mount face, you must shoot in M mode if you wish to adjust the shutter speed manually. The general instructions may be found in this article:

https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html

Your mirror lens is fixed aperture and presents a special case. In modes other than M, X, and B, your camera will default to Av mode, meaning that the camera will adjust the shutter speed for you. Exposure compensation may be used to adjust exposure up and down. With most K-mount lenses, there is a catch...the aperture stays wide open. With your lens, it makes no difference.

In M mode you can use the green button or the DOF preview lever to use the camera's meter or set the shutter speed manually using sunny-16 or a hand-held meter.

Steve

Rickster · 06-16-2016, 08:52 AM

Originally posted by stevebrot

If your lens does not have the "A" contacts on the mount face, you must shoot in M mode if you wish to adjust the shutter speed manually. The general instructions may be found in this article:

https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html

Your mirror lens is fixed aperture and presents a special case. In modes other than M, X, and B, your camera will default to Av mode, meaning that the camera will adjust the shutter speed for you. Exposure compensation may be used to adjust exposure up and down. With most K-mount lenses, there is a catch...the aperture stays wide open. With your lens, it makes no difference.

In M mode you can use the green button or the DOF preview lever to use the camera's meter or set the shutter speed manually using sunny-16 or a hand-held meter.

Steve

Thanks Steve!!! Your link provided the clue I needed ... Set "Using Aperture Ring" to ON ! ( Menu Item 26 on the K3 II ) Once I set that I was able to also set my Focal Length, and set my shutter speed in Manual mode. Saved everything to USER 3 and I'm all set!

Edit: p.s. I checked my K30 and it has the Aperture Ring set to ON ... So at some time in the past I had figured this out before. ;-)

SpecialK · 06-16-2016, 10:40 AM - **1 Like**

Originally posted by Rickster

Edit: p.s. I checked my K30 and it has the Aperture Ring set to ON ... So at some time in the past I had figured this out before. ;-)

Have not understood why this is not a default ON.

It is like asking if you want a left and right shoe in that pair.

**pepperberry farm** · 06-17-2016, 03:51 AM

Originally posted by SpecialK

Have not understood why this is not a default ON.

It is like asking if you want a left and right shoe in that pair.

^^^^ this - exactly, this....

Rickster · 06-17-2016, 07:56 AM

Originally posted by SpecialK

Have not understood why this is not a default ON.

It is like asking if you want a left and right shoe in that pair.

Makes you wonder if there is a performance hit for turning on that bit of code, otherwise why have the function at all. Like the lens correction code. We know there is a performance hit with those. Something we could test I guess. ;-)

06-16-2016, 07:18 AM	#1
Rickster Veteran Member Join Date: Jun 2007 Location: SE Idaho - Rocky Mtns Photos: Gallery Posts: 580	K-3 II and Sigma 600mm Mirror Lens When I power down the K-3 II and attach the Sigma 600mm then power up, I do not get the focal length adjustment screen. I also can not adjust shutter speed. I've attached a capture of the Menu screen. Note: When I use my Samyang 8mm I DO get a focal length adjustment screen and CAN adjust shutter speed. I can also attach the Sigma to my K30 and it works fine. In the attached image the "F ---" in the bottom blank box is missing as it blinks and I did not capture it. Am I missing something here??? Attached Images

06-16-2016, 08:52 AM	#3
Rickster Veteran Member Join Date: Jun 2007 Location: SE Idaho - Rocky Mtns Photos: Gallery Posts: 580 Original Poster	Originally posted by stevebrot If your lens does not have the "A" contacts on the mount face, you must shoot in M mode if you wish to adjust the shutter speed manually. The general instructions may be found in this article: https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html Your mirror lens is fixed aperture and presents a special case. In modes other than M, X, and B, your camera will default to Av mode, meaning that the camera will adjust the shutter speed for you. Exposure compensation may be used to adjust exposure up and down. With most K-mount lenses, there is a catch...the aperture stays wide open. With your lens, it makes no difference. In M mode you can use the green button or the DOF preview lever to use the camera's meter or set the shutter speed manually using sunny-16 or a hand-held meter. Steve Thanks Steve!!! Your link provided the clue I needed ... Set "Using Aperture Ring" to ON ! ( Menu Item 26 on the K3 II ) Once I set that I was able to also set my Focal Length, and set my shutter speed in Manual mode. Saved everything to USER 3 and I'm all set! Edit: p.s. I checked my K30 and it has the Aperture Ring set to ON ... So at some time in the past I had figured this out before. ;-) Last edited by Rickster; 06-16-2016 at 08:57 AM.

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06-16-2016, 08:20 AM - 1 Like	#2
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	If your lens does not have the "A" contacts on the mount face, you must shoot in M mode if you wish to adjust the shutter speed manually. The general instructions may be found in this article: https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html Your mirror lens is fixed aperture and presents a special case. In modes other than M, X, and B, your camera will default to Av mode, meaning that the camera will adjust the shutter speed for you. Exposure compensation may be used to adjust exposure up and down. With most K-mount lenses, there is a catch...the aperture stays wide open. With your lens, it makes no difference. In M mode you can use the green button or the DOF preview lever to use the camera's meter or set the shutter speed manually using sunny-16 or a hand-held meter. Steve

06-16-2016, 10:40 AM - 1 Like	#4
SpecialK Pentaxian Join Date: Dec 2006 Location: So California Photos: Gallery Posts: 16,480	Originally posted by Rickster Edit: p.s. I checked my K30 and it has the Aperture Ring set to ON ... So at some time in the past I had figured this out before. ;-) Have not understood why this is not a default ON. It is like asking if you want a left and right shoe in that pair.

06-17-2016, 03:51 AM	#5
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,636	Originally posted by SpecialK Have not understood why this is not a default ON. It is like asking if you want a left and right shoe in that pair. ^^^^ this - exactly, this....

06-17-2016, 07:56 AM	#6
Rickster Veteran Member Join Date: Jun 2007 Location: SE Idaho - Rocky Mtns Photos: Gallery Posts: 580 Original Poster	Originally posted by SpecialK Have not understood why this is not a default ON. It is like asking if you want a left and right shoe in that pair. Makes you wonder if there is a performance hit for turning on that bit of code, otherwise why have the function at all. Like the lens correction code. We know there is a performance hit with those. Something we could test I guess. ;-)

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