jagsiva Posted November 20, 2009 Share #1 Posted November 20, 2009 Advertisement (gone after registration) I am relatively new to the M8. I recently got an SF58 and am using it on an M8 with the latest firmware. My lenses are all coded and I have "lens detect" enabled. My issue is that in TTL mode, the flash does not appear to pick up the aperture value set on the lens. It seems to be stuck at F4. Is this normal? From reading the manual, and also Sean Reid's review, both appear to indicate the appropriate aperture value is picked up. Thanks for your help. Link to post Share on other sites More sharing options...
Advertisement Posted November 20, 2009 Posted November 20, 2009 Hi jagsiva, Take a look here SF58 on M8. I'm sure you'll find what you were looking for!
jlindstrom Posted November 20, 2009 Share #2 Posted November 20, 2009 I'm not familiar with the flash and my M8 had to be sent to Solms straight after buying it so I'm not the most competent to answer this.. others with more experience, correct me if I'm wrong! The flash unit should pick up the correct aperture for a coded and recognised lense. BUT as the lenses have no electrical connection to the camera, the flash unit only picks up the lenses fastest, nominal, aperture. Meaning if you have a f4 lense, it will pick f4 and for an f1.4 lense it'll pick f1.4 and so on.. Now, when you're shooting it is _your job_ to instruct the flash to use another aperture if you have changed from the fastest aperture to something else. So, you're partially correct but when operating M-series cameras remember that they're mainly manual cameras and that lenses have no electrical connection to the body. //Juha Link to post Share on other sites More sharing options...
Steve Ash Posted November 20, 2009 Share #3 Posted November 20, 2009 There is no way beside manually setting the lens aperture. But my understanding is that in TTL mode there is no need to set this manually as the actual light is measured through the lens. Regards Steve Link to post Share on other sites More sharing options...
Guest mc_k Posted November 20, 2009 Share #4 Posted November 20, 2009 Steve has it right. But what I am not clear on is whether you can compensate in this mode by changing the aperture setting on the flash? Link to post Share on other sites More sharing options...
dpattinson Posted November 20, 2009 Share #5 Posted November 20, 2009 You can adjust the aperture setting manually by using the 'set' button on the back of the flash. In TTL mode it doesn't really have any effect, apart from changing the 'effective range' displayed on the flash. The manual suggests a minimum shooting distance of 1/10 of that number, so it is kind of handy to have the correct range showing. Link to post Share on other sites More sharing options...
jagsiva Posted November 20, 2009 Author Share #6 Posted November 20, 2009 There is no way beside manually setting the lens aperture. But my understanding is that in TTL mode there is no need to set this manually as the actual light is measured through the lens. Regards Steve Steve, think your're bang on. I just realised this after all the exposures looked fine. TTL does indeed use the physical aperture setting. The annoying thing is that the apeture setting on the flash is stuck at F4, regardless of the lens/aperture being used, butt everthing appears to work fine. On the SF58, there is no way to manually set ISO or Apeture when using the M8. This is true for all modes - A, TTL and Manual. I spent a good part of last night finding this out Jag Link to post Share on other sites More sharing options...
jagsiva Posted November 20, 2009 Author Share #7 Posted November 20, 2009 Advertisement (gone after registration) You can adjust the aperture setting manually by using the 'set' button on the back of the flash. Actually, with an M8, you cannot do this. In TTL and A modes, the SET button changes EV. In M mode it changes output power. No setting for Aperture. Jag Link to post Share on other sites More sharing options...
dpattinson Posted November 20, 2009 Share #8 Posted November 20, 2009 Actually, with an M8, you cannot do this. In TTL and A modes, the SET button changes EV. In M mode it changes output power. No setting for Aperture. Jag really? I think you'll find that if you press the set button several times it cycles through EV, aperture, and zoom factor while mounted on the M8 in TTL mode... you adjust the values by using the other +/- buttons. I say this while holding the camera with flash mounted and pressing the buttons - so I'm pretty confident it does work You can't set the ISO however - that gets communicated from the camera. Link to post Share on other sites More sharing options...
jagsiva Posted November 20, 2009 Author Share #9 Posted November 20, 2009 really? I think you'll find that if you press the set button several times it cycles through EV, aperture, and zoom factor while mounted on the M8 in TTL mode... you adjust the values by using the other +/- buttons. I say this while holding the camera with flash mounted and pressing the buttons - so I'm pretty confident it does work You can't set the ISO however - that gets communicated from the camera. Thanks David! You're absolutely right. I thought the Japanese-translated-to-English manuals were bad Link to post Share on other sites More sharing options...
Guest mc_k Posted November 20, 2009 Share #10 Posted November 20, 2009 thanks David Link to post Share on other sites More sharing options...
daleeman Posted November 20, 2009 Share #11 Posted November 20, 2009 I too and new to the 8.2 and have the flash. Have noticed the F4 thing going on. I have gotten some mixed results with the flash. I need to do some more tests to get strong predictable results. I used it at a family baptism and found myself with some over exposed images shot in close quarters with a 35mm F3.5 older chrome lens that I coded with a pen and template. Hope to have some samples soon. Lee Link to post Share on other sites More sharing options...
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