First Moon Pics
Discussion
Hi All,
Had my first go at shooting the moon through my telescope last night. Now...I'm quite pleased with the results although they are a bit blurred, looking back theres a few changes I should have made i.e. using a higher ISO (these were on 200) so I could get faster shutter speeds and reduce any shake at this high magnification.
My problem was...I decided to take these after quite a long session at the boozer
and wasn't thinking to straight!
Still, thought I would share anyway....
Cheers
>> Edited by fazz81 on Wednesday 18th May 12:09
Had my first go at shooting the moon through my telescope last night. Now...I'm quite pleased with the results although they are a bit blurred, looking back theres a few changes I should have made i.e. using a higher ISO (these were on 200) so I could get faster shutter speeds and reduce any shake at this high magnification.
My problem was...I decided to take these after quite a long session at the boozer
and wasn't thinking to straight! Still, thought I would share anyway....
Cheers
>> Edited by fazz81 on Wednesday 18th May 12:09
fazz81 said:Assuming you are using a digital camera - there is a method (which I only know very vaguely about) whereby the camera can lock up the mirror (like when cleaning the sensor) before making the exposure so as to further minimise camera shake.
i.e. using a higher ISO (these were on 200) so I could get faster shutter speeds and reduce any shake at this high magnification.
I am sure one of our resident experts will embellish/rubbish (probably quite rightly!) this soon
but it may be worth looking in to (if you'll pardon the pun).
I thought there was a mirror lock up function on the D70? It explains about using it to clean the camera in the manual.
How will this help reduce camera shake, not sure I understand what locking the mirror does....
Thats not as far as it can zoom in either, its possible to get 400x magnification, but the picture does get quite blurry as that level!
How will this help reduce camera shake, not sure I understand what locking the mirror does....
Thats not as far as it can zoom in either, its possible to get 400x magnification, but the picture does get quite blurry as that level!
fazz81 said:(Assuming no knowledge so apologies in advance if this "insults your intelligence"!)...
How will this help reduce camera shake, not sure I understand what locking the mirror does....
The mirror is there to show you, through the lens, what you are looking at. When you click the button to make the exposure, the mirror has to move out of the way to allow the image to expose the sensor.
Under the kind of magnifications you are using, I think that the movement of the mirror moving out of the way could even contribute to a small amount of blurring. If it is already out of the way - this is, of course, avoided.
Like I say - I really don't know whether this is true or I made it up or what! - but it makes sense to me. I'll try and find the article I read but hopefully some knowledgable person will be along soon to help me out!... please!
Using the mirror lock up facility comes in handy for taking photos on a tripod when using the bulb setting, basically when you take a photo the mirror flips up to expose the sensor and in doing so can cause vibration which in turns shows up as a blurry pic, by using the mirror lock up facility the first press on the shutter flips the mirror up you then wait for the vibrations to settle down before taking the photo. Locking the mirror up to clean the sensor is however a different thing.
Cheers
Ian
Cheers
Ian
chim_knee said:
..about right..
In simple but stupid terms:
It's like a day out on a coach trip to Bognor..........
A dSLR (or SLR for that matter) goes "Whizz-crash-flick-blip-click-click-whizz-crash" when you depress the shutter.
Whizz - mirror starts moving up out of the way; your viewfinder image mysteriously goes black; perhaps someone's turned the light out
Perhaps a rocker just hit you over the head crash - mirror comes to a sticky end as it
into the underside of your viewfinder; sends a small earthquake all round your nice steadily held camera flick - electronically and mechanically, the body tells the lens to stop down; in a miniature world the guillotine like blades swoop in and stop down in your lens like gulls picking off your fish and chips
blip - all those little electrons go shunting round by the power of electrickery to make lots of exciting things happen, they'll even tell your flashgun to blow itself up, kerboom, and then...
click - the first shutter curtain go whizzing across the face of the image sensor (or film) momentarily flooding it with over-enthusiastic photons on a day trip to their own mods and rockers fight on the beach that is the image plane, followed by
click -
whoa, boy, the second shutter blade comes hard on the heels of the first whizz - or, in fact "whizz, whizz, whizz" because the two shutter blades go back to where they started, the guillotine like blades in your lens fall back again, having devoured half your cod roe and large portion, and the mirror, having just started to settle down from its explosive attack on the bottom of your pentaprism, now drops back into place, and...
crash - hits the stop
back where it started. Now the ability to lock up the mirror, is simply that you put it up first, let the shockwave die down and so the whole shooting match is that much more solid and has one less set of Tsunami-style vibrations before you let the photons in for their big moment. Thus they get better aim at the little old ladies that are the photo sensors and only knock out the ones they are supposed to be decking.....
And then the real shame of it is that the clever little chappie that designed the D70 didn't think it important enough to add to the camera's otherwise impressive army (and bunch of useless mod layabouts) of features.
But then as George the Whatever once said: "B7££3r Bognor!"
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