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**wtlwdwgn** · 10-27-2014, 10:03 AM

I guess I was thinking of an automatic diaphragm stopping down without the extra buttons or levers. When shooting with my 1964 SV (in 1964) and ST 55 f/1.8 I never had to stop the lens down to make an exposure because it was automatic. I seem to remember the older cameras needing to be stopped down manually before exposure which darkened the viewfinder. Of course I may have gotten the C Nile Virus!

**WPRESTO** · 10-27-2014, 11:20 AM

Originally posted by wtlwdwgn

I guess I was thinking of an automatic diaphragm stopping down without the extra buttons or levers. When shooting with my 1964 SV (in 1964) and ST 55 f/1.8 I never had to stop the lens down to make an exposure because it was automatic. I seem to remember the older cameras needing to be stopped down manually before exposure which darkened the viewfinder. Of course I may have gotten the C Nile Virus!

If we're going to '64, both the original Nikon F and Canonflex had been on the market for several years, and I believe both had quick, auto close-open diaphragms from their introduction. My first Pentax, also my first 35mm camera, was a Pentax "S" followed by either a Heiland or Honeywell Pentax which had the pin operated close-open diaphragm system that remained standard on numerous 42mm lens mount cameras for many years.

**wtlwdwgn** · 10-27-2014, 01:47 PM

Thanks for the info.

**monochrome** · 10-27-2014, 02:17 PM

Originally posted by lithedreamer

The only obvious mention of K-8 I could find: Re: Should I wait for the Pentax K-8, or get a D90 now?: Pentax SLR Talk Forum: Digital Photography Review
cameraphilia nervosa

I can't wait for the W-8

Not a Number · 10-27-2014, 03:27 PM

Originally posted by WPRESTO

If we're going to '64, both the original Nikon F and Canonflex had been on the market for several years, and I believe both had quick, auto close-open diaphragms from their introduction.

The Minolta SR-2 introduced in 1958 featured a fully automatic stop-down diaphragm.

**RussV** · 10-28-2014, 08:06 AM

Surely the next flagship will be a K2 not K4 if Pentax stay with this series naming conventions.

**WPRESTO** · 10-28-2014, 10:51 AM

Originally posted by Not a Number

The Minolta SR-2 introduced in 1958 featured a fully automatic stop-down diaphragm.

According to Wikipedia, Exacta introduced the external diaphragm mechanism in 1954, and the first internally operated, close/re-open diaphragm mechanism was introduced on the ill-fated Zunow camera of 1958. Truth is, the original Nikon F really established the 35mm SLR as THE camera design.

ragmanjin · 10-28-2014, 10:39 PM

Originally posted by Clavius

Apart from being disgusting, that camera would also be the first one to which a lot of people will be allergic to.

Thank you for existing.

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10-27-2014, 10:03 AM	#31
wtlwdwgn Site Supporter Join Date: Jan 2007 Location: Billings, MT Photos: Gallery \| Albums Posts: 13,853	I guess I was thinking of an automatic diaphragm stopping down without the extra buttons or levers. When shooting with my 1964 SV (in 1964) and ST 55 f/1.8 I never had to stop the lens down to make an exposure because it was automatic. I seem to remember the older cameras needing to be stopped down manually before exposure which darkened the viewfinder. Of course I may have gotten the C Nile Virus!

10-27-2014, 11:20 AM	#32
WPRESTO Loyal Site Supporter Join Date: Aug 2010 Location: Massachusetts Photos: Gallery \| Albums Posts: 59,144	Originally posted by wtlwdwgn I guess I was thinking of an automatic diaphragm stopping down without the extra buttons or levers. When shooting with my 1964 SV (in 1964) and ST 55 f/1.8 I never had to stop the lens down to make an exposure because it was automatic. I seem to remember the older cameras needing to be stopped down manually before exposure which darkened the viewfinder. Of course I may have gotten the C Nile Virus! If we're going to '64, both the original Nikon F and Canonflex had been on the market for several years, and I believe both had quick, auto close-open diaphragms from their introduction. My first Pentax, also my first 35mm camera, was a Pentax "S" followed by either a Heiland or Honeywell Pentax which had the pin operated close-open diaphragm system that remained standard on numerous 42mm lens mount cameras for many years.

10-27-2014, 01:47 PM	#33
wtlwdwgn Site Supporter Join Date: Jan 2007 Location: Billings, MT Photos: Gallery \| Albums Posts: 13,853	Thanks for the info.

10-27-2014, 02:17 PM	#34
monochrome Loyal Site Supporter Join Date: Mar 2008 Location: Working From Home Photos: Gallery \| Albums Posts: 26,276	Originally posted by lithedreamer The only obvious mention of K-8 I could find: Re: Should I wait for the Pentax K-8, or get a D90 now?: Pentax SLR Talk Forum: Digital Photography Review cameraphilia nervosa I can't wait for the W-8

10-27-2014, 03:27 PM	#35
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Originally posted by WPRESTO If we're going to '64, both the original Nikon F and Canonflex had been on the market for several years, and I believe both had quick, auto close-open diaphragms from their introduction. The Minolta SR-2 introduced in 1958 featured a fully automatic stop-down diaphragm.

10-28-2014, 08:06 AM	#36
RussV Site Supporter Join Date: Mar 2013 Photos: Gallery \| Albums Posts: 302	Surely the next flagship will be a K2 not K4 if Pentax stay with this series naming conventions.

10-28-2014, 10:51 AM	#37
WPRESTO Loyal Site Supporter Join Date: Aug 2010 Location: Massachusetts Photos: Gallery \| Albums Posts: 59,144	Originally posted by Not a Number The Minolta SR-2 introduced in 1958 featured a fully automatic stop-down diaphragm. According to Wikipedia, Exacta introduced the external diaphragm mechanism in 1954, and the first internally operated, close/re-open diaphragm mechanism was introduced on the ill-fated Zunow camera of 1958. Truth is, the original Nikon F really established the 35mm SLR as THE camera design.

10-28-2014, 10:39 PM	#38
ragmanjin Junior Member Join Date: Nov 2013 Location: Great White North, eh Posts: 25	Originally posted by Clavius Apart from being disgusting, that camera would also be the first one to which a lot of people will be allergic to. Thank you for existing.

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