2nd post, welcome to the forum!
RX10 is too big/heavy for me, I use the smaller rx100's
rx100m6 or m7 is a terrific travel camera with easily implemented 'extra reach'.
Sony Smart Zoom using Smart Telecon (jpeg only)
SZ = Smart Zoom = In-Camera Optical Sensor Crop, no digital processing. Only at 10mp or 5mp image sizes
ST = Smart Telecon = a method of Rapidly Toggling SZ. (No CIZ using ST). no digital processing.
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The whole ‘extra reach’ story
https://www.dpreview.com/forums/thread/4373614
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excerpts
SZ Smart Zoom (medium 10mp and small 5mp image sizes only, no SZ at 20mp)
An optical in-camera sensor crop, with no other in-camera processing. It is the same as a crop you would make later in software. No extra pixels created. Crops have increasingly fewer pixels. An in-camera SZ crop, and a matching crop in your software will have the same # of pixels. Of course post crops can be of either Jpeg or RAW images.
SZ is Automatically Engaged (if/when you use 10mp or 5mp Image Sizes). There is no menu option. Watch the zoom bar/listen to the zoom motor, using 10mp or 5mp image size, after 200mm OZ a magnifier icon appears with a number i.e. 1.3x.
20mp image size: SZ: None. CIZ, if engaged, starts after the end of OZ
10mp image size: SZ range is 1.1x to 1.4x. (201-280mm max optical crop, no upscale),
5mp image size SZ range 1.1x to 2.0x (201-400mm max optical crop, no upscale).
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- ST Smart Telecon= a method of Rapidly Toggling SZ as fixed steps, not progressive zoom. Image Sizes are also Toggled Automatically. Magnifier Icon with x Factor appears on lcd.
You Must Assign Smart Telecon to a Custom Key (button or rocker).
While shooting OZ 20mp Image Size:
1st press instantly jumps to SZ 1.4x (and changes to 10mp image size)
2nd press instantly jumps to SZ 2.0x (and changes to 5mp image size)
3rd press, jumps back to OZ 1.0x 20mp Image Size.
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Rx100m6 extra zoom photos
https://www.dpreview.com/forums/thread/4314962
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Rx100m6 Smart Zoom
https://www.dpreview.com/forums/thread/4305652
rx100m6 setup suggestions
https://www.dpreview.com/forums/thread/4300834
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All of the above and many more threads about these miniature marvels found here
https://www.dpreview.com/forums/thread/4637229#forum-post-66118549