Sony In-Camera Extended Zoom Types Explained (Jpeg Only)

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Sony In-Camera Extended Zoom Types Explained (Jpeg Only)
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In-Camera Extended Zoom Types Explained

(Jpeg Only) ....... please don’t have the RAW vs Jpeg discussion here. ......

examples are based on rx100m6 (see VII. for all other RX models)

..........................................

CONDENSED VERSION

OZ (Optical Zoom) … SZ (Smart Zoom) … CIZ (Clear Image Zoom) … DZ (Digital Zoom)

x Factors: (OZ = 1.0x) (SZ @ 10mp = 1.4x; @ 5mp = 2.0x) (CIZ @ 20mp = 2.0x; @ 10mp = 2.8x; @ 5mp = 4.0x)

EXTENDED Focal Length = Optical Focal Length … multiplied by … Sony x Factor (i.e. 200mm x 1.4x = 280mm)

EXIF Digital Zoom Line (exact) is the Same as Sony’s ___x Factor (rounded). OZ is EXIF Digital Zoom: 1.

Exceeding OZ: a magnifying glass icon appears on the zoom bar with a number ( the x Factor) (the __x Factor increases as you keep zooming, i.e. 1.3x … 1.4x, … 2.8x … 4.0x). EXIF Digital Zoom Line Exceeds 1.

…………………………………….

All rx100’s and RX10’s have: OZ, SZ, CIZ, DZ.

Later models also have ST (Smart Telecon) which is a Method of Toggling SZ.

RX1’s have ST and CIZ. (ST via AEL button): Toggles Sensor Crops: 50mm; 70mm; back to 35mm. (CIZ via right rocker) zooms 1.1x to 2.0x = 36-70mm

……………………………………..

OUTLINE

I. Simple Definitions of OZ; SZ; ST; CIZ; DZ

II. Why Use Them? My Reasons.

III. Confusions

IV. Detailed Explanations of SZ AND CIZ

V. ST (Smart Telecon) a Method of SZ Toggle) (no CIZ using ST)

VI. EXIF and EXIF Deductive Math (diplomas will be given)

VII. ALL RX Models Extended Zoom Ranges

……………………………………………….

I. SIMPLE DEFINITIONS of OZ; SZ; ST; CIZ; DZ:

OZ = Optical Zoom

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.

CIZ = Clear Image Zoom = In-Camera Optical Sensor Crop and In-Camera Digital Processing (upscaling: inventing, guessing, creating new pixels digitally)

DZ = Digital Zoom. All Digital Processing. I never tried current DZ, Anyone???.

……………………………………………………..

II. WHY USE THEM? My reasons.

Lightweight Extra Zoom for:

Effortless; Occasional/Situational Use; Surprisingly Good (good enough for you?)

View/Focus/Meter while magnified. Discover something you were otherwise unaware of. You can combine extra zoom with focus magnification assist (very magnified). Magnification gives the ability to see your remote subject clearly, and, because so visible you can wait for something to finish the shot:

i.e. bird winks at you, lion lifts his head, croc swallows something, cloud moves, momentary stillness, wind blows a branch in or out of the way, truck making shadow/blocking ….. moves, a myriad of things not easily visible if viewing OZ shorter focal length, perhaps not ideal timing revealed in a post crop.

Both focus and metering automatically change to full screen area size. That seems a disadvantage, however you are zoomed in so much that full screen area size is perhaps smaller than spot area size from afar using OZ. Focus and Metering systems see only your magnified area.

ALL Extra Zoom retains/uses the camera’s aperture at the end of optical zoom. IF IQ good enough for you, the retained aperture can actually beat a longer optical lens that is darker/higher iso/noise/requires longer shutter speed/blur.

In all cases, zoom scales and icons appear on the LCD and EVF. In all cases, because they are progressive, you can leave them on and not use them, or, keep zooming a little, or a lot, as desired.

SZ and CIZ are far better than any past DZ you might have seen.

I always say, even RAW shooters: “At least try them so you know”. If interested: keep checking these features out on each new model/processor: CIZ upscaling algorithms progressively improve. In-camera processing power increases.

……………………………………………………..

III. CONFUSIONS

Is it Digital Zoom? OZ and SZ: No. CIZ: Partly. DZ: Totally

SZ or CIZ are often erroneously called Digital Zoom. This leads to misunderstandings.

Extra Zooms are entered/used Sequentially: OZ, then SZ automatically, then optionally CIZ or DZ with CIZ.

EXIF shows all extra zoom in a separate line: ‘Digital Zoom’ (Sony SZ, CIZ, DZ names are gone) (EXIF notes part VI)

SZ Automatically Occurs at 10mp or 5mp image sizes (no menu option)

CIZ or DZ are Optionally Engaged: CIZ without DZ, or DZ which also engages CIZ (CIZ occurs before DZ).

SZ and CIZ can be engaged together and will be entered/used progressively.

ST is a Method of using SZ, not a separate zoom type.

Extra Zoom Power, both SZ and CIZ Increases when you Decrease the Image Size

Jpeg Compression is Independent of OZ, SZ, CIZ. If using Jpeg Extra Fine, everything will be Extra Fine.

……………………………………………………..

IV. DETAILED EXPLANATIONS of SZ and CIZ

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).

…………………………………….

CIZ Clear Image Zoom (optional, you must turn it on in the menu) (always double the extra reach of SZ)

Two stages: In-Camera Optical Sensor Crop AND In-Camera Digital Processing (up-scaling, new pixels created. upscaled to the original Image size being used.

It is progressive: use it some, some new pixels are created. Use it more, more pixels are created.

A simplification: 20mp image size, full CIZ use for 400mm: stage one: optical sensor crop of 20mp image size. Let’s say that results in 10mp. Stage two: upscale, digitally guess and create 10mp new pixels to get back to full 20mp pixel count.

This is the part where improving algorithms play a part. And, improving processors need to be capable and quick.

It is the same as if you later made a matching crop from a 20mp optical shot, (now 10mp left), and then upscale digitally in your software, back to 20mp. Difference is: you did not see magnified when shooting, however you may prefer your software, and your computer’s processing. Of course post crops can be of either Jpeg or RAW images.

If you compare an in-camera CIZ to a post crop that has not been upscaled, the CIZ will have more pixels, the larger the crop, the larger the pixel difference is.

For me, this is where SZ and CIZ being EFFORTLESS begins and ends. Then, is it good enough?

……………………………………………………..

V. 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.

……………………………………………………..

VI. EXIF

SZ, CIZ, DZ: Sony’s Names Disappear in EXIF. EXIF calls them all ‘Digital Zoom’

EXIF has 3 lines for zoom information.

  1. Focal Length (actual lens focal length, irrespective of sensor size).
  2. 35mm Focal Length (equivalent to 35mm film/FF Sensor) (the crop factor math is calculated for you)
  3. Digital Zoom. ALL Optical Photos, show ‘Digital Zoom: 1 (which means no extra zoom used).

EXIF Digital Zoom: a # greater than 1 indicates the use of some type of extended zoom with any camera. Multiply the Digital Zoom # by the 35mm equivalent Focal Length i.e. 200mm x 1.3000 = 260mm (35mm equivalent).

EXIF Digital #s (exact) Correspond to Sony’s __x #s (rounded). i.e. Sony SZ 1.4x: EXIF # might be 1.43456

………………………..

EXIF DEDUCTIVE MATH (is this OZ, an OZ Crop, SZ or CIZ)?

If Digital Zoom 1. It is OZ or OZ Crop

If Digital Zoom greater than 1. It is SZ or CIZ. Which One? answer depends on the image size:

20mp image size: (no SZ at 20mp). CIZ from 1.1000 to 2.0000 = 201-400mm max

10mp image size: SZ first, 1.1000 to 1.4000 = 201-280mm max; then CIZ begins 1.4100 to 2.8000 = 281-560mm.

5mp image size: SZ first, 1.1000 to 2.000 = 201-400mm then CIZ begins 2.1000 to 4.000 = 401-800mm.

……………………………………………………..

VII. ALL RX MODELS EXTENDED ZOOM RANGES

Reminder: SZ = Optical Sensor Crop. CIZ = Optical Sensor Crop + Digital Upscaling

a. rx100m6 OZ 24-200mm (used in examples above) (RX10m1,2 are the same)

20 mp image size: OZ, then CIZ 1.1x to 2.0x: (201-400mm max CIZ) (no SZ at 20mp image size)

10mp image size: OZ, then SZ 1.1x to 1.4x (201-280mm max SZ) then CIZ 1.5x to 2.8x (281-560mm max CIZ)

5mp image size: OZ, then SZ 1.1x to 2.0x (201-400mm max SZ) then CIZ 2.1x to 4.0x (401-800mm max CIZ)

b. rx100m1,m2 OZ 28-100mm

20 mp image size: OZ, then CIZ 1.1x to 2.0x: (101-200mm max CIZ) (no SZ at 20mp image size)

10mp image size: OZ, then SZ 1.1x to 1.4x (101-140mm max SZ) then CIZ 1.5x to 2.8x (141-280mm max CIZ)

5mp image size: OZ, then SZ 1.1x to 2.0x (101-200mm max SZ) then CIZ 2.1x to 4.0x (201-400mm max CIZ)

b. rx100m3,4,5 OZ 24-70mm

20 mp image size: OZ, then CIZ 1.1x to 2.0x: (71-140mm max CIZ) (no SZ at 20mp image size)

10mp image size: OZ, then SZ 1.1x to 1.4x (71-100mm max SZ) then CIZ 1.5x to 2.8x (101-200mm max CIZ)

5mp image size: OZ, then SZ 1.1x to 2.0x (71-140mm max SZ) then CIZ 2.1x to 4.0x (141-280mm max CIZ)

c. RX10m1,m2: OZ 24-200mm = same range as rx100m6 #s above

d. RX10m4 OZ 24-600mm (get ready for some big numbers)

20 mp image size: OZ, then CIZ 1.1x to 2.0x: (601-1,200mm max CIZ) (no SZ at 20mp image size)

10mp image size: OZ, then SZ 1.1x to 1.4x (601-840mm max SZ) then CIZ 1.5x to 2.8x (841-1,680mm max CIZ)

5mp image size: OZ, then SZ 1.1x to 2.0x (601-1,200mm max SZ) then CIZ 2.1x to 4.0x (1,2011-2,400mm max CIZ)

e. RX1r, RX1rII OZ fixed 35mm, and ST (SZ toggled) 50mm and 70mm optical sensor crops, and CIZ 36-70mm

…………………………………………………….

End of notes.

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Elliott

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