Please note, the resolution is also much higher on mobiles. Not the pixel size counts. The responsive web design aims to provide similar visual sizes on every device. This is even more important for the controls (buttons, hotspots), which need to be able to handle with a finger. Those controls are this big on purpose, and I don't want to change them. Try it! If you make the controls or font size too small, google will warn you on a mobile audit, and google search will push your page back in the search results. Not everything is about aesthetics and pixel peeping in web design.
Thank you for your feedback. Of course I fully agree with you when it comes to device with a touch screen; I was refering to the control size being too big, because the caption size is also too big at the same time.
I have attached a screen shot from the same album on my Samsung mobile, but this time from the start page, you will see that this just contradics what you wrote:
The same Projector controls on the left side are now way too small than previously.
The size of the font used in this page are much smaller than on the page with photos that I sent you.
This is really not consistent.
So please look carefully at my image sample and the supplied link to my album: I would believe there is clearly something wrong in the settings of the responsive web design.
You didn't respond also about the item "2" above, why there are lost space in the width for the caption on the PC test when the screen resolution is lower.