This is the English edition of a review from my Japanese YouTube channel, iestaLife. I review gadgets from my home studio in Japan, so product links go to Amazon Japan.
Quick take
The K&F Concept monitor mount does almost everything my SmallRig mount does, adds a hand-tightened knob for the tilt angle, and cost 2,657 yen against 4,299 yen for the SmallRig model with a knob. Unless you use it on professional shoots every day, the cheaper one is enough.

What I tested
- K&F Concept monitor mount (black with orange accents)
- My older SmallRig monitor mount, which needs a hex key to tighten
- A Sony mirrorless camera, with an iPhone 17 Pro Max as the monitor
- A MagSafe stand with a 1/4-inch thread to hold the iPhone
Comparison
| Price | 2,657 yen | 4,299 yen |
| Weight | 81.1 g | 71.6 g |
| Tilt lock | Knob | Hex key |
| Color | Orange accents | Silver accents |
The SmallRig weight and photo are of my older model. The 4,299 yen price is for its newer version with a knob.
What I found
- The knob matters: with my old mount, a loose setting made the monitor wobble, so I kept it fully tightened and could not change the angle. With the K&F knob I can tilt the screen when shooting from above or when there is glare, then lock it again by hand.
- Size and weight: the SmallRig is slightly slimmer and about 10 g lighter. The knob sticks out a little, but it never bothered me.
- Out of the box: it comes with a hex key and a single sheet of paper. The head was slightly crooked on arrival, and the hex key fixed it.

Using an iPhone as the camera monitor
What I really wanted was to use my iPhone as an external monitor. Sony’s Creators’ App can now do this over a wired USB-C connection. Over wireless I used to see lag when I moved my hand in front of the lens; wired, I could not see any. The iPhone screen is larger and brighter than the camera’s own display, and it needs no separate power like a dedicated field monitor.

Who it is for
- Hobby and YouTube shooters who want an adjustable mount without paying for a big brand.
- Sony users who like matching the orange accents.
- If you want the slimmest, lightest option from an established rig maker, the SmallRig is still a good choice.
Watch the video
The video is in Japanese. The iPhone monitor demo starts at about 5:40.
Limitations
I had used the mount only for a short time when I recorded this, so I cannot comment on long-term durability. Prices were Amazon Japan prices at the time of recording.
Products
K&F Concept monitor mount with tilt knob: on Amazon Japan
SmallRig monitor mount 2905B: on Amazon Japan
The Amazon Japan links above are affiliate links. As an Amazon Associate, I earn from qualifying purchases. Check the listing for the exact model, current price and shipping availability in your region.
More reviews in English




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This review is also available in Japanese.


