CS adapter for the Q

**Clinton** · 02-23-2014, 11:44 AM - **1 Like**

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H8 RX to Pentax Q | eBay

Seller says it's a CS mount adapter from his shop. I've ordered one up.

VisualDarkness · 02-23-2014, 03:27 PM

Interesting and opens up a new world of easy to mount cheap lenses if it works!

hnikesch · 02-23-2014, 04:25 PM

I built my CS adapter altering a D-2-Q adapter by opening up the hole to 1" and gluing in a CS lens. The D-2-Q adapter is available om Ebay for about $6 you just need a thin shim under the lens, a little trial and error for thickness. At that price I have an adapter glued to 2 of my CS lenses

GibbyTheMole · 02-24-2014, 05:39 AM

Intriguing, but it's kinda steep for a little metal ring, IMO. Hopefully someone will come out with a more reasonably priced one.

Mistral75 · 02-24-2014, 05:53 AM

Originally posted by Clinton

H8 RX to Pentax Q | eBay

Seller says it's a CS mount adapter from his shop. I've ordered one up.

Beware, H8 RX mount is NOT a CS mount. H8 RX mount is the mount of H-8 REX cameras, the first 8mm cameras designed by Bolex. These are 8mm reflex cameras equipped with a turret.

Bolex Collector | Cameras | H-8 REX

The H8 RX mount is close to the C mount except that the optical distance between lens seat and film plane is 15.305mm compared with 17.52 on regular C mount and 12.5mm on CS mount.

**manishved** · 02-24-2014, 08:13 AM

Originally posted by Mistral75

Beware, H8 RX mount is NOT a CS mount. H8 RX mount is the mount of H-8 REX cameras, the first 8mm cameras designed by Bolex. These are 8mm reflex cameras equipped with a turret.

Bolex Collector | Cameras | H-8 REX

The H8 RX mount is close to the C mount except that the optical distance between lens seat and film plane is 15.305mm compared with 17.52 on regular C mount and 12.5mm on CS mount.

So while the lens may be mountable, the registration distance maybe an issue....let us know when you get it....

GibbyTheMole · 02-24-2014, 08:17 AM

Originally posted by Mistral75

The H8 RX mount is close to the C mount except that the optical distance between lens seat and film plane is 15.305mm compared with 17.52 on regular C mount and 12.5mm on CS mount.

So the bottom line is the lens will be a couple of mm too far away from the sensor to focus properly. Bummer.

02-23-2014, 11:44 AM - 1 Like	#1
Clinton Site Supporter Join Date: Feb 2010 Location: Salt Lake City, UT Photos: Gallery \| Albums Posts: 1,910	CS adapter for the Q 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. H8 RX to Pentax Q \| eBay Seller says it's a CS mount adapter from his shop. I've ordered one up.

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02-23-2014, 03:27 PM	#2
VisualDarkness Veteran Member Join Date: Nov 2011 Location: Uppsala, Sweden Photos: Gallery Posts: 4,439	Interesting and opens up a new world of easy to mount cheap lenses if it works!

02-23-2014, 04:25 PM	#3
hnikesch Veteran Member Join Date: May 2009 Location: Michigan, USA Photos: Albums Posts: 1,316	I built my CS adapter altering a D-2-Q adapter by opening up the hole to 1" and gluing in a CS lens. The D-2-Q adapter is available om Ebay for about $6 you just need a thin shim under the lens, a little trial and error for thickness. At that price I have an adapter glued to 2 of my CS lenses

02-24-2014, 05:39 AM	#4
GibbyTheMole Veteran Member Join Date: Nov 2009 Location: Iowa Photos: Albums Posts: 2,275	Intriguing, but it's kinda steep for a little metal ring, IMO. Hopefully someone will come out with a more reasonably priced one.

02-24-2014, 05:53 AM	#5
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527	Originally posted by Clinton H8 RX to Pentax Q \| eBay Seller says it's a CS mount adapter from his shop. I've ordered one up. Beware, H8 RX mount is NOT a CS mount. H8 RX mount is the mount of H-8 REX cameras, the first 8mm cameras designed by Bolex. These are 8mm reflex cameras equipped with a turret. Bolex Collector \| Cameras \| H-8 REX The H8 RX mount is close to the C mount except that the optical distance between lens seat and film plane is 15.305mm compared with 17.52 on regular C mount and 12.5mm on CS mount.

02-24-2014, 08:13 AM	#6
manishved Loyal Site Supporter Join Date: Mar 2008 Location: N. Calif Photos: Gallery \| Albums Posts: 3,651	Originally posted by Mistral75 Beware, H8 RX mount is NOT a CS mount. H8 RX mount is the mount of H-8 REX cameras, the first 8mm cameras designed by Bolex. These are 8mm reflex cameras equipped with a turret. Bolex Collector \| Cameras \| H-8 REX The H8 RX mount is close to the C mount except that the optical distance between lens seat and film plane is 15.305mm compared with 17.52 on regular C mount and 12.5mm on CS mount. So while the lens may be mountable, the registration distance maybe an issue....let us know when you get it....

02-24-2014, 08:17 AM	#7
GibbyTheMole Veteran Member Join Date: Nov 2009 Location: Iowa Photos: Albums Posts: 2,275	Originally posted by Mistral75 The H8 RX mount is close to the C mount except that the optical distance between lens seat and film plane is 15.305mm compared with 17.52 on regular C mount and 12.5mm on CS mount. So the bottom line is the lens will be a couple of mm too far away from the sensor to focus properly. Bummer.