First Meter: A question, a photograph, and general amazement

bieber wrote in post #6037406
Now do remember, the sun is bound by the inverse square law. You can't very well take an incident reading here on Earth, if you mean to photograph Mars

You'd only be off by a stop or so.

DocFrankenstein wrote in post #6038329
You'd only be off by a stop or so.

That would depend on where the Earth and Mars are in their respective orbits around the sun. It could be off by a tad more than a stop or hardly at all, that is, discounting any influence Earth's weather can have on the sunlight reaching the surface.

PacAce wrote in post #6038490
That would depend on where the Earth and Mars are in their respective orbits around the sun. It could be off by a tad more than a stop or hardly at all, that is, discounting any influence Earth's weather can have on the sunlight reaching the surface.

How else would I be able to tell that there's going to be a stop difference in between the exposures? Earth is one astronomical unit from the sun, the mars is 1.5 AU

DocFrankenstein wrote in post #6038584
How else would I be able to tell that there's going to be a stop difference in between the exposures? Earth is one astronomical unit from the sun, the mars is 1.5 AU

Yes, but that's based on the average distance of each from the sun. The actual distance can vary. After all, the planets do not orbit the sun is a circle, do they?

Plus we have to take into account the varying thicknesses of atmosphere and so on. Has anyone checked the Mars lander photos for EXIF?

PacAce wrote in post #6039186
Yes, but that's based on the average distance of each from the sun. The actual distance can vary. After all, the planets do not orbit the sun is a circle, do they?

Ok... sure.

PacAce wrote in post #6039186
Yes, but that's based on the average distance of each from the sun. The actual distance can vary. After all, the planets do not orbit the sun is a circle, do they?

I think the lesson here is this - If you're going to Mars, don't forget to pack the L-358 in your camera bag! (Hey, your camera bag will be lighter there, so you might as well pack a few extras ).

I want to know how much extra a 2nd bag is to going to cost for that mars trip

bbeck4x4 wrote in post #6040864
I want to know how much extra a 2nd bag is to going to cost for that mars trip

Not nearly as much as what they're going to charge you for food and drinks. I wouldn't be surprised if the lavatories had doors with coin boxes instead of door handles.

PacAce wrote in post #6041067
Not nearly as much as what they're going to charge you for food and drinks. I wouldn't be surprised if the lavatories had doors with coin boxes instead of door handles.

Nah! Coins weigh too much for a trip like that - it would be all paper money slots!

This thread hasn't drifted at all.

Here is a question for you, to bring it (sort of) back on-topic:

For a trip to Mars, which light meter would you bring, and why?

Well after dragging my feet for a while I am going to get one. I use laptops on location to get my exposure and overall scene lighting the way I want (and will have to continue doing this for certain types) but I want make it a little faster process than chimping.

Why would I want the L-758DR over the L-358?

pcunite wrote in post #6046431
Why would I want the L-758DR over the L-358?

The only time *I* would get the L-758DR over the L-358 is if I needed to use (reflective) spot metering. Since I didn't, I bought the L-358. I use my L-358 mostly for flash metering in the studio and on location, incident metering for certain situations, and that's about it. If I need to spot-meter, I will use my camera.

The L-358 is smaller, cheaper and just as accurate a meter, so unless you need the spot metering, there is really no need to spend money on the top-of-the-line model, IMO.

Reasons to choose the L-758DR over the L-358 would be:

- Built in 1°spot metering and viewfinder with LED display
- Built in Pocket Wizard radio transmitter
- Custom Profiling
- 3 Camera memory

Those are the key differences. If those items are not important or you don't see yourself moving in a direction where you need them then skip the L-758DR and either get an L-358 or a used L-558R which has most of the 758 features but it's discontinued and they can be found at some very good prices.