tobias_moh

Hello everybody,

Just recently I purchased a used Nikkor-SW 90 1:8 in mint condition. What immediately made me become suspicious was that I could easily push the aperture lever far beyond the f/8 marking. Is this normal? Does anyone else here own such a lens and could check?

At f/8 the aperture blades start to become insivible so generally, this thing should work. I just wonder if it was reshuttered improperly which might also cause the other f-stop markings to be inaccurate.

My Nikkor-M 300 1:8 (which I bought new) has precise hard stops at f/9 and f/128. Otherwise I probably wouldn't have noticed. These are the only two lenses I own for 4x5.

Thanks for your help and best regards,

Tobias

<p>Just a quick update:<br>

I replaced the tubes in both flashes ($20 for the tubes and about 2 hours fiddling) and they work perfectly again!<br>

Thanks for your help!</p>

<p>I've got a second SB 600 that's even worse. It rarely fires anymore. Just opened it up and the tube looks even worse. Like it's cracked all over.<br /><br />I bought these 2 years ago - used - from a pro wedding photographer who shot the crap out of them. I hope it's really the worn out tubes.<br>

<img src="http://www.fotos-hochladen.net/uploads/flashtube24wr6fvtcl9.jpg" alt="" width="1380" height="1140" /><br>

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Larger version here: <a href="http://www.fotos-hochladen.net/uploads/flashtube24wr6fvtcl9.jpg">http://www.fotos-hochladen.net/uploads/flashtube24wr6fvtcl9.jpg</a><br /><br>

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<p>Dear photo.net community,<br /> my Nikon SB 600 flash behaves strangely. It fires 30 or so perfectly lit shots in succession (1/64 power, so no overheating or charging issues, the flash is always indicating"ready") and then it suddenly stops flashing at all or flashes too dimly for a few shots. You can hear it click and see the "READY" light recharging and blinking and then being continuously on, but no light at all or just too little when you fire it.<br /> After a while it continues working again and may or may not repeat the above.<br /> I am now tearing it apart in search for the cause of all that. I expected it to be a cracked solder point or a bad capacitor (not the main capacitor because recycling times even at full power are perfectly within specs, around 2 seconds with Eneloops).<br /> Before starting to re-solder everything or looking for bloated caps I had a look at the flash tube and it looked like in the picture. Doesn't this look very bad? Could this be the reason for its behavior?<br /> I expected the xenon tube to be in perfect order, because when it fired, it fired well and with full power.<br /> Replacing the bulb is fairly easy and cheap, so I just wanted to know if I should start there or if it is fair to assume that this isn't the cause.<br /> Thanks</p>

<p><img src="http://www.fotos-hochladen.net/uploads/flashtubeh4l0dxopfu.jpg" alt="" width="1495" height="1235" /></p>

<p>Larger version here: <a href="http://www.fotos-hochladen.net/uploads/flashtubeh4l0dxopfu.jpg">http://www.fotos-hochladen.net/uploads/flashtubeh4l0dxopfu.jpg</a></p>