| View previous topic :: View next topic |
| Author |
Message |
kyonthinh
Joined: 30 Mar 2012
Posts: 222
Location: Germany
|
 Posted: Wed Apr 18, 2012 3:12 pm Post subject: Weston Master III problem |
 |
|
kyonthinh wrote:
I bought this one along with my cameras and lenses for 15 bucks. It works!
But there is a problem. When I set to exposure 100 with it, I must set my camera to Iso 200 to have correct exposure, 200 and 400 and more. Am I wrong because I dont know how to use it, or this one need to calibrate?
 |
|
| Back to top |
|
 |
Excalibur
Joined: 19 Jul 2009
Posts: 5017
Location: UK
Expire: 2014-04-21
|
| Posted: Wed Apr 18, 2012 3:38 pm Post subject: |
|
|
Excalibur wrote:
erm Doesn't look like my III or IV maybe for the US market or a later model...anyway basically you set the asa, then decide for bright or dim light by opening the back, then point the meter at the subject and the needle will stop at a number in the window, then turn dial with the big arrow until it lines up with the number that the needle showed in the window, then read what shutter speed/aperture that you would want to use.
_________________
Canon A1, AV1, T70 & T90, EOS 300 and EOS300v, Chinon CE and CP-7M. Contax 139, Fuji STX-2, Konica Autoreflex TC, FS-1, FT-1, Minolta X-700, X-300, XD-11, SRT101b, Nikon EM, FM, F4, F90X, Olympus OM2, Pentax S3, Spotmatic, Pentax ME super, Praktica TL 5B, & BC1, , Ricoh KR10super, Yashica T5D, Bronica Etrs, Mamiya RB67 pro AND drum roll:- a Sony Nex 3
.........past gear Tele Rolleiflex and Rollei SL66.
Many lenses from good to excellent. |
|
| Back to top |
|
|
skida
Joined: 02 Mar 2012
Posts: 1826
Location: North East England
|
| Posted: Wed Apr 18, 2012 3:55 pm Post subject: |
|
|
skida wrote:
There is a user's manual here:
http://www.urmonas.net/manuals/westonIII/westonIII.html
The one in the manual may be different, but I am sure the methods will be the same. |
|
| Back to top |
|
|
Jesito
Joined: 24 Aug 2007
Posts: 5745
Location: Olivella, Catalonia, (Spain)
Expire: 2015-01-07
|
| Posted: Wed Apr 18, 2012 4:21 pm Post subject: |
|
|
Jesito wrote:
If I'm not wrong, the earlier Weston meters used the Weston Units instead of ASA.
The equivalence is Weston 80 = ISO 100.
Not sure if that one is in the case, my Weston III (that looks different from yours) is.
http://forum.mflenses.com/notes-on-repairing-weston-master-iii-light-meter-t16996,highlight,%2Bweston.html
Regards.
Jes.
_________________
Jesito, Moderator 
Jesito's backsack:
Zooms Sigma 70-300, Tamron 35-135 and 70-210 short, 70-210 long, 28-70 CF Macro, 35-70, 35-80, Vivitar 70-210 KA, Tamron 70-250.
Fixed Industar-50, , Tamron 24mm, Tamron 135mm, Sands Hunter 135mm, Pancolar 50mm, Volna-3, many Exakta lenses
DSLR SIGMA SD9 & SD14, EOS 5D, Sony A700 and NEXF3, Oly E-330, E-400, E-450, E-1
TLR/6x6/645 YashicaMat, Petri 6x45, Nettar, Franka Solida, Brilliant
SLR Minolta X300, Fuji STX II, Praktica VLC3, Pentax P30t, EXA500, EXA 1A, Spotmatic(2), Chinon CM-4S, Ricoh, Contax, Konica TC-X , Minolta 5000, 7000i, 3Sxi, EOS 500 and CX
Rangefinders Chinon 35EE, Konica C35 auto, Canonet 28, Yashica Lynx, FED-2, Yashica electro 35, Argus C3 & C4, Regula Cita III, Voigtlander Vitoret (many), Welta Welti-I, Kodak Signette 35, Zorki-4, Bessa-R & L, Minolta Weathermatic, olympus XA2
Compact Film Konica C35V, Voigtlander Vitorets, Canon Prima Super 105, Olympus XA2 and XA3
Compact Digital Olympus C-5050, Aiptek Slim 3000, Canon Powershot A540, Nikon 5200, SIGMA DP1s, Polaroid X530, IXUS55, Kodak 6490, Powershot G9 and G10
CSCCanon EOS-M, Samsung NX100 and NX210, Lumix G5, NEX-F3
Last edited by Jesito on Thu Apr 19, 2012 3:44 am; edited 1 time in total |
|
| Back to top |
|
|
kyonthinh
Joined: 30 Mar 2012
Posts: 222
Location: Germany
|
| Posted: Wed Apr 18, 2012 4:22 pm Post subject: |
|
|
kyonthinh wrote:
Thanks both of you, and yes, I have done the correct process before I asked. So it's the same as before, ex: if I set exposure 100, f5.6 so it points to 500 speed, then I must set my camera to iso 200 with f5.6, 500 speed and I will have absolutely correct exposure.
@ I have just checked the back, and it writes ASA=1.0, so I think this is ASA scale. |
|
| Back to top |
|
|
skida
Joined: 02 Mar 2012
Posts: 1826
Location: North East England
|
| Posted: Wed Apr 18, 2012 4:43 pm Post subject: |
|
|
skida wrote:
Does it use batteries? If it does and the originals were mercury then alkaline batteries can give false readings. |
|
| Back to top |
|
|
Excalibur
Joined: 19 Jul 2009
Posts: 5017
Location: UK
Expire: 2014-04-21
|
| Posted: Wed Apr 18, 2012 4:50 pm Post subject: |
|
|
Excalibur wrote:
| skida wrote: |
| Does it use batteries? If it does and the originals were mercury then alkaline batteries can give false readings. |
No batteries and the meters can last for ages, I bought mine S/H about 30 years ago and it is still accurate...hey I still have the receipt bought in 24/10/1980 for £15
_________________
Canon A1, AV1, T70 & T90, EOS 300 and EOS300v, Chinon CE and CP-7M. Contax 139, Fuji STX-2, Konica Autoreflex TC, FS-1, FT-1, Minolta X-700, X-300, XD-11, SRT101b, Nikon EM, FM, F4, F90X, Olympus OM2, Pentax S3, Spotmatic, Pentax ME super, Praktica TL 5B, & BC1, , Ricoh KR10super, Yashica T5D, Bronica Etrs, Mamiya RB67 pro AND drum roll:- a Sony Nex 3
.........past gear Tele Rolleiflex and Rollei SL66.
Many lenses from good to excellent. |
|
| Back to top |
|
|
kyonthinh
Joined: 30 Mar 2012
Posts: 222
Location: Germany
|
| Posted: Wed Apr 18, 2012 5:15 pm Post subject: |
|
|
kyonthinh wrote:
It has selenium cell, so there is no battery.
It has better result than my nova metering, but I really want to know why it has that problem. |
|
| Back to top |
|
|
luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
|
| Posted: Wed Apr 18, 2012 7:47 pm Post subject: |
|
|
luisalegria wrote:
What camera are you using ?
Are you checking the Weston meter against the camera meter ?
I often have different readings depending on the meter.
These handheld meters are not spot or center weighted meters, they measure light coming in over a wide angle, so they have to be used with care.
I check meter readings like this - where possible I look for a spot where the light I want to meter is falling on my hand. Then I point the meter at my hand. Its like using a grey card.
Another way to check is to use 'sunny 16' in bright sunlight.
Set ISO =100, point meter at brightly lit building. At 100 speed it should read on or close to f/16
My usual meter, always in my pocket, is a little plastic Selenium cell Sekonic I bought when I was a teenager in 1975. It still works.
_________________
I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
|
| Back to top |
|
|
kyonthinh
Joined: 30 Mar 2012
Posts: 222
Location: Germany
|
| Posted: Wed Apr 18, 2012 9:07 pm Post subject: |
|
|
kyonthinh wrote:
I use Sony Alpha 580, and yes i check the camera meter against the meter.
I also checked in close range, and it has 1/3-2/3 stop slower than camera metering, but it's still an acceptable result. And more interesting, my weimar lux nova with Cds cant be used in my room with only one light source, but the Weston can. |
|
| Back to top |
|
|
visualopsins
Joined: 05 Mar 2009
Posts: 10998
Location: California
Expire: 2025-04-11
|
| Posted: Fri Apr 20, 2012 2:20 am Post subject: Re: Weston Master III problem |
|
|
visualopsins wrote:
| kyonthinh wrote: |
I bought this one along with my cameras and lenses for 15 bucks. It works!
But there is a problem. When I set to exposure 100 with it, I must set my camera to Iso 200 to have correct exposure, 200 and 400 and more. Am I wrong because I dont know how to use it, or this one need to calibrate?
|
looks like mine -- model 737
when I set dials on mine to same settings as shown in photo above, the "Exposure Index" is at 320 Weston units. Set at 80 for iso 100.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
|
|
| Back to top |
|
|
kyonthinh
Joined: 30 Mar 2012
Posts: 222
Location: Germany
|
| Posted: Fri Apr 20, 2012 2:23 pm Post subject: Re: Weston Master III problem |
|
|
kyonthinh wrote:
| visualopsins wrote: |
looks like mine -- model 737
when I set dials on mine to same settings as shown in photo above, the "Exposure Index" is at 320 Weston units. Set at 80 for iso 100. |
+1.
Now I know it's always nearly correct, or something it's correct... |
|
| Back to top |
|
|
visualopsins
Joined: 05 Mar 2009
Posts: 10998
Location: California
Expire: 2025-04-11
|
| Posted: Sat Apr 21, 2012 7:09 am Post subject: Re: Weston Master III problem |
|
|
visualopsins wrote:
| kyonthinh wrote: |
| visualopsins wrote: |
looks like mine -- model 737
when I set dials on mine to same settings as shown in photo above, the "Exposure Index" is at 320 Weston units. Set at 80 for iso 100. |
+1.
Now I know it's always nearly correct, or something it's correct... |
The dials are always correct.  The dials are only circular slide rule; they don't affect meter reading.
In the photo, Exposure Index is set to 320 (iso 400); it works!
There is an attachment -- the Invercone -- a translucent dome that fits over the light cell to convert the meter to measure incident light. I use mine as incident meter.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
|
|
| Back to top |
|
|
kyonthinh
Joined: 30 Mar 2012
Posts: 222
Location: Germany
|
| Posted: Sat Apr 21, 2012 10:37 am Post subject: Re: Weston Master III problem |
|
|
kyonthinh wrote:
| visualopsins wrote: |
The dials are always correct. The dials are only circular slide rule; they don't affect meter reading.
In the photo, Exposure Index is set to 320 (iso 400); it works!
There is an attachment -- the Invercone -- a translucent dome that fits over the light cell to convert the meter to measure incident light. I use mine as incident meter. |
Yes, it's always correct, and now I know why people liked it.
Thank you very much. |
|
| Back to top |
|
|
|
|
Search
Memberlist
Register
Profile
Log in to check your private messages
Log in
