I bet you could do the experiment without the aircraft. Just place your objects on the ground under your home's balcony or other elevated perch and compute the values using millimeters and centimeters instead of feet. Tip: if you use inches, use an engineer's scale that provides 10ths of inches to simplify the math. I do admit, using the airplane would be more fun...

I agree, 85mm is the glass of choice. Not to hijack the thread but I have a full frame Canon with the 24-105mm lens. Aside from the faster glass one gets with the 85mm prime, can I get the same results by placing my zoom at 85mm and doing portraits? What do I lose? Thanks.

In the 1980 - 1995 decades I would travel to the Prescott area quite frequently. That lake is lovely with water as I remember it. The last time I was out there it was completely dry. Nice to see it filled in. A lot of rock climbing practice is done right there in the Granite Dells. You can just pull off the road, suit-up and climb, no hike required to find the rock face. Well done little reminder for me, thanks.

I have the Westcott FJ400 two light backpack set. https://www.fjwestcott.com/fj400-strobe-2-light-backpack-kit-with-fj-x2m-universal-wireless-trigger
I went with these because they had a good amount of power and had standard Bowen's mounts for light modifiers. If you have multiple cameras you only need the one wireless trigger. See note below...

I love them. Here is a key feature for you to consider. Is your specific camera fully supported by the system controller (Fj-X2m)? In order for you to get full TTL functionality your camera needs to be specifically supported, otherwise you will need to do a few extra things in setting your exposures. Here is the link to the page of models currently supported by their ever-evolving firmware (easy to update). Scroll down the page
https://www.fjwestcott.com/fj400-strobe-2-light-backpack-kit-with-fj-x2m-universal-wireless-trigger
I shoot a Canon 6D MkII and it took three firmware updates to finally include my camera. But I can say they were very responsive to my questions and in helping me to learn how to use the lights. Last word, they have some weight to them. You will need good light stands, especially when you add large soft boxes.

I concur with this. Mt Whitney is the peak on the far right of that pic. You have probably photographed Lone Pine Peak which looks a lot higher because it is a lot closer to the road. The Alabama Hills hosted quite a few Hollywood features. Now that you have been there you will recognize them in any number of old time westerns or features that need a striking outdoor location. You make me miss being there and taking one last hike up to the top.

I had one of the Mavica models. Mine used a half-sized re-writable CD and had no view finder, just the LCD panel on the back. In any bright light it was very difficult to see the image to frame the photo. I took it to Iraq in 2004 with the intent of documenting my tour and killing the camera. We both survived. I found it to be a clumsy camera to handle and was quite happy to retire it when a friend gifted me his well used Canon 10D. I still have the Mavica somewhere...

A few threads lately discussed getting a new wide angle lens and a response opined about stitched panos (my thought actually to the new lens). So just go with the idea that a person knows how to create a panoramic photo in PS or whatever... So lets, as a group, create the ultimate landscape photo. Lets incorporate all our tools. So what is the work flow? how do we do it? think about doing HDR photos from raw images, photos incorporating various depth of field settings to get both the horizon and foreground crisp. Now do that for a wide-angle pano of say, a mountain range or cityscape. How do you pull it off? For the sake of this thread lets just say the pano will use only two lateral views. I can see this requiring many photos and a lot of post processing. What is your workflow to provide the most "high tech" photo?

I had been thinking the same thing when looking at the wide-angle lens threads. why not go with a stitched pano??? Time to post a new thread....

God bless that woman for being such a steadfast model for you.

I have used my middle finger many times. While it might impact the strength of grip with the right hand, if you hold the camera like I do, most of the support comes from your left hand anyway. I have also done this middle finger technique when shooting firearms with equally good results. Your body adapts if pushed. Make it so.

I spent a very cold June night up on Grand Mesa. It was still early enough in the year that the snowpack was still intact and the service road back to where the local astronomy group had their dark site was still under five feet of snow. I went up there specifically to do some telescope viewing and ultimately was frustrated but not disappointed. I live in a relatively light polluted location so the night sky reveals only the most obvious stars and that makes it easy to set up and navigate among the stars. Well I got set up well before dusk and waited. Early on I got great views of Saturn and Jupiter, easy targets and then waited for full dark for deep sky viewing. Well it never really got dark. It was a moonless night but the white ground cover was actually well lit by the rich and endless canopy of stars. My frustration came from my inability to find my guide stars among the millions of stars so after an hour of just hunting about I gave up. Packed up my equipment and then did the best thing of the night. I set up my sleeping pad on the roof of my van, and zipped myself up in my sleeping bad and just watched the night sky. I was reminded of the line from "2001, a space Odyssey, "My God it is full of stars." And so it was. Marvelous. No photos taken (beyond my skills at the time) but memorable and well worth dealing with the cold.

Sounds good, thanks. I doubt my friend will need the continuous shooting mode but it is nice to have the option. The more I find out about the R5 the more I want it... Now I just have to wait until they start offering it with discounts or accessory bundles.

thanks, will pass that on. Truth told he is at the advanced novice stage and honestly would be best served by one of the crossover waterproof cameras that are much smaller and lighter. But, if I suggested that I would not get sales royalties from Canon for my recommendations... ;-)

Thanks for the responses everyone. I figured it would be like the 5D but did not want to assume. I can see the one place where it might be damaged is the articulated screen on the back. But, I have that feature on my 6D and it is safely stored and has never gotten tangled up in anything that could rip it off. Although I'd personally love to have a 1DX (for bragging rights as I have no practical reason for it) for my friend the 1DX is not an option for two reasons, price and weight. He will be afoot on his treks so both size and weight are a consideration. Thanks again all for your information.

I have been to Ken Rockwell's site and he mentions the R5 is weather sealed just as well as the 5D IV. He did not mention anything about it being as robust as the 5D. For those who know, is it as robust in build as the 5D? Please answer only if you actually know the answer. I have a friend who is planning on expedition travel in tropical locales who needs a good camera that can take a beating. He is not invested in any camera system or maker. His budget is flexible and at present can cover the entry price for the R5 and good glass.
Thanks!