[rollei_list] Re: Meter Testing
- From: "Stephen Attaway" <stephen@xxxxxxxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Sat, 22 Aug 2009 09:35:53 -0700
Hi Elias:
I believe Bogen Imaging still overhauls Luna Pros. They are still listed in
their 'standard repair pricing' page as 'estimate only'. If you are losing
confidence in yours, send it in. Or pick up a brand new reference meter -
the Gossen Digisix just dropped in price to $125 at B&H.
----------------------
Like you, I keep two reference meters - in my case a Luna Pro SBC and Luna
Pro Digital. I use them to check my in camera meters, as well as using the
Digital for flash work and the SBC in the field. My method is pretty simple:
find flat evenly lit evenly toned surfaces in sunshine/open shade/daylit
rooms and make some checks at each.
I adjust the camera meter iso to agree with my reference meters in bright
sunlight (that is, I might set the camera iso to 50 when the reference meter
is set to iso 100). If the meters then agree all the way down to a well lit
room (not in direct sunlight), I make a note to use the camera at iso 50
with iso 100 film. If the camera meter shows a widely different reading in
low light its definitely time to repair it or stop using it.
The standard for meter accuracy in Modern Photography used to be 1/2 stop,
measured from a calibrated light source. For myself, I send the camera in
for a meter overhaul if it doesn't meet that standard - or just use it with
a handheld meter. I have a Nikon F Photomic that goes non-linear below f2 at
1/60 (f5.6 with its telephoto attachment), so I only use the Photomic in
good light and switch to my known good hand held meter when in doubt.
I also use my reference meters to check my other hand-held meters: my Luna
Pro is 1/3 stop out (and dead linear). I set it to 125 iso for iso 100 film.
I've found I bat about .500 with older meters - end up throwing away half of
the ones I buy.
Hope this helps,
Stephen Attaway
----- Original Message -----
From: "Elias Roustom" <eroustom@xxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Saturday, August 22, 2009 8:49 AM
Subject: [rollei_list] Meter Testing
Hi All,
My hand held meters, a Gossen Luna Pro, and Sekonic Auto Lumi L-158
(selenium), read more or less the same, but they are often off by as much
as a stop from my TTL meters in my SLRs, and don't always match what my
Rollei 35 reads. I consider the meter in my Rollei 35 to be one of the
most reliable (and it's still running a mercury battery that came with
the camera, my guess is the battery is about 15 years old). Any thoughts
on meter testing, battery life, the difference between types of meters?
Not a new topic, I know, but it's something I've been bogged down with
recently since my Gossen started to give me some strange readings over
vacation.
Elias
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