![]() ![]() My lightmeter was apparently not super precise but usable a few weeks ago. I compensate this difference through the ISO setting (informing the camera a value ⅓ stop above: iso 125 for a 100 film) If film was "so precise or else it would be ruined" the lightmeter on my Pentax K1000, for example, would be a minuscule slit where the needle would have to fit perfectly in reality the ideal zone given is around a full stop and a half (and I've always metered perfectly with it), so don't sweat it, it's very forgiving ![]() The contact is stable and working fine (the battery indicator shows it's at its maximum) – also, as I've pointed out before, the 0.15v difference is negligible (⅓ or ⅔ of a stop), especially considering how film has an amazing range for over and underexposures. I'm using the LR44 battery with a rubber circle around it the exact size for them both to cover the area of a mercury battery (laterally), and a small tin ring on the negative side for better contact ![]() Sunny 16 kinda works, but not really: the lightmeter will read ok using sunny 16 on bright stuff like a metal door, but not so much on a stone wall right beside it, reading as 1 or 2 stops underexposedĭon't know if it's an uncalibrated lightmeter or if it's a characteristic of the lightmeter from the FT since it apparently captures the light from the middle of the frame To get to the right exposure at F11 I need to go to 1/30" (which is right) To get to the right exposure at 1/125" I need to go between F 2.8 and F 4 If I go one stop down either way (-1), the equivalent exposures should be Settings that should be equivalent are kinda weirdįor example, the lightmeter will go straight to the middle when shooting a scene at To compensate that I've set the ISO for 125 (I'm using an ISO 100 film) It's just 0.15V, and from what I've researched it makes basically no difference, maybe 1 or 2/3rds of a stop I'm using an LR44 battery (1.5V) because it normally uses a 1.35V mercury battery (discontinued, obviously). The only thing concerning me is the lightmeter. I haven't had it sent to be checked because the times sound/look alright, it loads the film properly, the camera itself looks like it came straight from the factoryĪlso I bought a Canon FL f1.4 II to go with it and I'm shooting a test roll The battery capacity of alkaline LR44 batteries is approximately 110 mAh, while that of silver-oxide ranges between 165-170 mAh.I got a Canon FT, it appears to be working perfectly. Unlike alkaline batteries whose voltage drops over time, silver-oxide batteries have nearly constant voltage during the use. Silver-oxide batteries ordinarily have longer shelf-life than alkaline batteries. Silver-oxide batteries feature a nominal voltage of 1.55V while its counterpart boasts a nominal voltage of 1.5V. Alkaline batteries are more affordable than silver-oxide batteries. There are several significant differences between these two chemistries. These are examples of silver-oxide batteries. It’s a long-lasting zero mercury specialized battery that boasts a nominal voltage of 1.5V. If you wish to power medical devices, calculators and watches, consider using the Energizer 357/303 battery. It works well in both high and low temperatures and is widely used in alarm transmitters, calculators and sugar level detectors. This alkaline button cell battery offers long power life and suitable uninterruptible power sources for your device. Just like LR44 alkaline battery, GPA76 batteries boast high quality and high reliability. However, alkaline L1154 batteries are not easy to find locally, as Energizer and Duracell dominate the battery button market in the US. They’re cheaply available online and you get much more value for the money spent. The letter “R” indicates its cylindrical (round) cell, while 11 and 44 signify the battery’s diameter and height, respectively.Īn L1154 battery is a 1.5-volt alkaline button cell battery of the LR44 specification. For instance, the proprietary name for LR44 in some companies is the International Electrotechnical Commission (IEC) LR1144 battery. The letter “L” symbolizes the electrochemical system used, an alkaline electrolyte. Manufacturers often assign proprietary names and numbers to their batteries. Moreover, the batteries work efficiently at temperatures of -10 degrees Celsius to +60 degrees Celsius. They have a cell size of 11.6 x 5.4mm and a capacity of 130mAh. Later designs include silver oxide batteries and feature a capacity of approximately three times as long a charge at a higher price.ĪG13 batteries feature a termination voltage of 0.9 volts and a standard voltage of 1.5V. They’re well known as 157 batteries and are equivalent in size and voltage to the SR44 batteries. Ever wondered which type of battery powers your hand watches? The AG13 is an alkaline zinc/manganese button battery that’s commonly used watches. ![]()
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