[rollei_list] Re: MF SLR lens designations
- From: "John Wild" <JWild@xxxxxxxxxxxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Wed, 20 Feb 2008 09:55:36 -0000
Hi Stan,
I was expecting someone with more knowledge than me to reply to your
question but as no one else has, so I will put finger to keyboard. ;-)
The original lenses for the SLX and 6006/2 (often referred to as HFT)
were designed for shutter priority auto exposure. The shutter speed was
set on the camera and the aperture ring on the lens set to 'A'. On
pressing the release the camera calculated the aperture that was
required, closed the aperture and closed, opened and closed the shutter
again to effect the exposure. The camera could be set to manual by
setting an appropriate aperture on the lens (as opposed to 'A'). In 1988
Rollei brought out the 6008 Professional. This had programmed, aperture
priority, shutter priority as well as manual exposure capability. The
exposure information (ie shutter speed and aperture) is displayed by
LEDs in the viewfinder. This required additional information to be
relayed from camera to lens and back, so more of the electrical contacts
were used. These lenses are designated PQ (Professional Quality). Rollei
also redesigned and improved the quality of the internal parts with this
series. The PQ lenses are fully useable on the SLX and 6006/2 cameras.
In 1993 Rollei brought out the 6008 Professional 1000. This had a top
shutter speed of 1/1000 with the appropriate lenses ie the PQS (S for
Superschnell - super fast). These lenses however do not have an aperture
pointer on the lens as with the HFT and PQ lenses. Presumably this
reduces the moving parts and enables the lens to operate faster. They
carry a sticker to the effect that they should not be used with the SLX
and 6006/2 cameras (because there is no way of telling what aperture the
camera will use when in automatic mode).
All lenses can be used on the latest 600X series cameras with some loss
of camera functions. They can also be used on the 6008AF which will give
'Focus Confirmation' when the subject is in focus.
A number of the lenses are available in both PQ and PQS versions. Rollei
seemed to work through the range to increase the shutter speed of most
of the lenses.
Regards
John
-----Original Message-----
From: rollei_list-bounce@xxxxxxxxxxxxx
[mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf Of Stan Yoder
Sent: 18 February 2008 13:45
To: rollei_list@xxxxxxxxxxxxx
Subject: [rollei_list] MF SLR lens designations
=20
How does a PQ lens differ from a non-PQ lens, esp. when used on an SLX
or 6006?
TIA,
Stan Yoder
---
Rollei List
- Post to rollei_list@xxxxxxxxxxxxx
- Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'=20
in the subject field OR by logging into www.freelists.org
- Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in
the subject field OR by logging into www.freelists.org
- Online, searchable archives are available at
//www.freelists.org/archives/rollei_list
---
Rollei List
- Post to rollei_list@xxxxxxxxxxxxx
- Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'
in the subject field OR by logging into www.freelists.org
- Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
'unsubscribe' in the subject field OR by logging into www.freelists.org
- Online, searchable archives are available at
//www.freelists.org/archives/rollei_list
Other related posts:
