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Registered Member #480
Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644
Based on the amount of damage to the phenolic disk, you may have also have toasted the motor bearings. Once the bearing balls and races get slightly pitted by internal arcing, the bearings will degrade rather quickly. They'll get real noisy before too much axial or radial play develops, so you should have plenty of warning before the rotor develops enough runout to crash the electrodes.
I'm considering a Nikon D40 for our knock-about lab camera. This camera will get constant daily use, mostly by people who are not photography-oriented, so ease-of-use and good autofocus & exposure control at macro distances are crucial.
Personally, I've used all-mechanical/all manual Nikon 35mm SLRs (F2 series) for the last 20+ years, but the convenience of digital imaging, and the unlimited image editing capability, have left my Nikons sitting idle most of the time. My 55mm and 105mm Micro Nikkor lenses provide extraordinary macro quality, but unless the images are going to be published, the digicams provide adequate quality for 99.9% of the everyday requirements. Shan
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
If you want really good macro performance from a DSLR, you may need to buy a dedicated macro lens for it. The whole point of detachable lenses is that you can optimise each lens for a narrower range of operation and then swap them around, rather than needing to make a single lens that does it all but not very well.
I don't know if Peter actually took the macro shot with a DSLR, or whether he used a macro lens or extension tubes, or whether the lens that shipped with his D70 just had good macro. I seem to remember that some Sony digicams have pretty extreme macro mode on them.
I had a lot of mechanical Pentax kit that I bought used over the years, so I got a Pentax ist-DS DSLR and used the existing lenses with it. That doesn't work too well though, I found myself missing the auto focus and exposure.
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Autofocus with a dSLR at macro magnification is not a brilliant experience and in some cases completely hopeless. If it is possible to get very close to the object I suggest a point and shoot camera for people that are not experienced.
Registered Member #10
Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
I looked at the exif data and date for the flying bullant photo. It was taken in 2005 with my old HP C812 4 megapixel digicam, not with a fancy DSLR macro. From 18.8cm (8 inches).
I can also do surprisingly good macros with my Ricoh Caplio R2 5MP digicam able to focus down to about 1cm.
For macro's of HV stuff you want to be further away hence my Nikon D70s with Sigma lens with the 1:1 macro at 40cm. I think Bjorn also has a Nikon D70s and similar macro lens.
My rotary spark gap is repaired and ready for a run. Look out for the new 5 pointed "Star of Tesla" within 24h. A TC like you've never seen it
This Golden Orb spider is taken with the Nikon. Spider was big enough not to need a macro!
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
I am planing to get a D40x for 750$ or a D80 for 1350$. Dose anybody think the D80 is worth the extra cash. I plan to take picturs of tesla action, PCB's, macro shots and genral scenery
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