A friend has given me a small bag of river sand of a suspicious reddish color. Once examined in the microscope and separated some grains, we have some pretty almandine garnets.

A friend has lent me a TG5 and this model allows you to focus far away. But it still does not use JPG at full resolution or RAW

Yes, I've seen it already. but it does not save nor raw nor even jpg at full resolution. Still missing to offer the benefits I expect. What I have discovered is that there are Olympus cameras of higher level than if they fit my desires. What does not fit is with my VISA.

Thanks

I have heard about the Olympus TG4 camera doing focus stacking automatically. But I read that this is a usable feature only in macro mode. I am very interested in being able to use an automatic stacking focus in studio photography of ceramic pieces, but I have not found anything about this. Does any...

Fluorite, sphalerite and yes, piromorphite. All samples from Euskadi, Spain.

This weekend I was able to take some photos of minerals. I still try to define what is the reason that worsens my photos when I use x20 or more amplification. I am really pleased with the results that I get with the x4 and with the x10 (despite being the x4 is an unmarked Chinese brand). But when I ...

I know the difficulties of photographing minerals with very reflective facets (and which are the ones we like the most). I like the control of brightness that you have achieved, sometimes it is really impossible to achieve the appearance, brightness and transparency of some minerals.

FOV 4mm, Nikon x10. The most difficult thing is to avoid dominant color in this colorless mineral on a black background. (and clean it...)

Thanks, Pau.
My 40x is a Nikon M Plan 0,5 ELWD. And the last image, with the Rodenstock 180 is below. The FOV is 0,7mm. and it is overproccesed, I use deconvolutions, Photoshop was not enougth...

After a season dedicated to astronomy I have devoted recently to discover how to increase the resolution of my pictures. I love those images that have no overflow of color that show good sharpness. I do not complain about my results, but I see better images than mine and that pushes me to investigat...

I have a lot of experience (too much years ) working with laser cut parts... What do you need? i'm located in Barcelona...

Looking at the dimensions, it seems like it should be possible to expand some of the M6 holes into 1/4" threaded holes. Or, to avoid messing with the breadboard, turn the 1/4" threads on the flash holder into M6 threads with a die. It seems like it should work. Anyone tried this? I have arranged M6...

Thank you. I am talking to a friend about eyeglass lenses. I tried, many years ago also, a long telescope of 2 meters to have the vision offered by the old single-lens telescopes. I used a lens for myopia, but the vision was horrible, it looked like a fresnel. That's why I was looking for another al...

Does anyone know where to buy simple lenses, flat concaves, cylindrical lenses to correct astigmatism? I bought in Surplus Shed but since they changed the website I can not find anything ...

Thank you