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You should of bought a Pentax then, same mount since the bayonet K-mount was brought out and with an M42 to K mount (another Pentax inovation) even the older screw mount lenses can be used on the latest Pentax DSLR bodies. I have a K3, K20, K10 and several old film cameras and all share the same lenses.
Use as wide open aperture as you've got to get maximum amount of light, depth of field is irelavent as the subject is far away. Manual focus is more accurate. Spot meter should be ok. Standard rule to avoid camera shake is 'shutter speed = 1/ focal length of the lens'.This photo is taken at 6:40am with a 1300mm lens on a Pentax K3, 1/250 sec, f6.7, iso400
Any digital sensor open for longer about 30 seconds will get hot and cause more noise. The heat is not good for the sensor. Most DSLR cameras have a longest time of 30 sec for this reason.
The camera has a rectangle view so without the cutouts on the side you would get vignetting (darkening) on the corners at wide angle view, for a telephoto lens this is not an issue and is not needed.
have you considered using rectangle pipe for a hood, also 2 layers of ply to make the bayonette fitting?
Nice idea. Cutting the 'filters' from sheet plastic or card and using a cokin holder will have to do the trick for me, have no access to fancy 3d printer or laser cutter gear.
Olive oil will go rancid and is very thick, a better oil is peanut or grape seed oil, even good old boiled linseed oil. Mix oil and mineral turps 50/50 and soak the mix in for 10 minutes till it wont absorb any more, wipe off surplus, sit out in sun to dry. The turps will evaporate leaving the oil soaked into the wood, keep wiping of the excess. Apply more oil mix after a few days and when the wood looks dry. Ive used many different oil finishes over the years and for a rough piece that is a working tool this looks like the most practical. Danish oil is good but expensive.
Next Steps for Photography
This is a neat, well presented instructable.I will have a go at making this but with off cuts so 1 pallet at a time not all at once.
Great instructable. You're a funny guy.I have 18V Ryobi tools so got the battery powered mower to match. From brand new had to sharpen the blade. Unplugged the battery, used the flap sander on my 18V angle grinder to give it a couple swipes on the cutting edge, no need to take the blade off. Ive got a very small lawn so get the lawn done with 1 lot of batteries and use what charge is left to do the edges with the wipper snipper.When I finish mowing I take the battery out and wash the mower and check the blade. It goes back in the shed clean and the batteries go on the charger ready to use.
anything over 30 seconds and the sensor will get hot, causing more noise.Have found this doing astro photography.
Nice tut, will have another go with your tips.This my attempt at shooting the Southern Cross, ISO 12800, 1/2 sec, f2.4 with a Pentax K3 and Pentax DAL 35mm f2.4 lens. Ive cropped and rotated the image otherwise as shot. I was 80km north of the town Southern Cross in Western Australia out in near desert, no light polution at all till the 1/4 moon came up..
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