Hey Malcolm, wow, sounds really tough :-) Sorry fro my ignorance, but what is Weston Master V ?
the target we worked for were blocked window vertical bars. Unfortunately I'm still waiting for the camera's manual which should arrive this week, so couldn't play much around AF settings. I assume the AF was set to regular 45 points. Should I try to limit it to central one in such kind of situations even though the maximum allowable aperture is in f/3.5-f/5.6 range ? That's strange since Minolta's specifications are similar as to AF sensing light levels and it still worked quite reliably. Regards, Alex Z -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Malcolm Stewart Sent: Tuesday, October 08, 2002 1:59 PM To: [EMAIL PROTECTED] Subject: Re: EOS Reply to Joe B. Hi Alex I accept your findings but the following points are worth bearing in mind: I've just plugged in your film speed, aperture and shutter speed settings into my trusty old Weston Master V, and the exposure value, EV, under which you were doing your tests was around 1 to -1. The EOS3's specifications state that the metering works over the range EV 0-20 with an EF 50 f1.4 (at 100 ISO), and whilst a lens isn't specified for AF that's quoted as covering EV 0-18. Your 28-135 has a maximum aperture of f3.5 which is ~1/6 as bright as f1.4 - so you shouldn't really expect reliable performance (against a contrasty target) until the EV gets up to ~2 to 3 (assuming a 50f1.4 for Canon's AF figures). Did your target offer both vertical and horizontal lines? Did you limit the EOS3 to just the central sensor? Malcolm Milton Keynes, UK ----- Original Message ----- From: Alex Zabrovsky <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, October 08, 2002 11:58 AM Subject: EOS Reply to Joe B. > I'll do my best to recall all the settings: > The Minolta lens used was 35-70/4 at 35mm f/4 against 28-135 IS at 35mm f/4. > Another test comprised 35-70/4 at 70mm f/5.6 against 28-135 at 70mm f/5.6. > In both cases 7 had no trouble to lock on the subject with his central > sensor (operating as cross type for f/2.8, regular at smaller apertures), > whilst EOS-3 gave up after short hunting. > The test was done at evening (late twilling I assume), however the subject > was clearly defined by unarmed eye. The distance was about 7-10 meters. The > AF assist light of 7 was Off by CF. snip * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
