[rollei_list] Re: MF SLR lens designations
- From: Frank Dernie <Frank.Dernie@xxxxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Wed, 20 Feb 2008 11:04:01 +0000
Hi all,
John is indeed more knowledgeable than I on this but there is one
small comment I would make. In my manual the reason given for the
sticker on PQS lenses saying not for use on SLX to 6006 cameras is the
extra current requirements. The peak current required by the faster
shutter in these lenses may apparently burn out tracks or components
in the cameras designed before this requirement existed.
Frank
On 20 Feb, 2008, at 09:55, John Wild wrote:
> 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
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