Logitech Webcam C310n を購入とC270との比較

昔ハードオフでLogicool C270 を500円ほどで購入して使っていました．ビデオミーティングを良くするようになってC270はマイクもついているので便利に使っていました．でもマイクにノイズが乗るようになりNotePC内蔵ウェブカムやスマートフォンをWebcamとして利用していましたが使いにくいしマイクがついていないので少し不便．今回ひとつ上の機種のC310n を購入しました．

720pビデオを実現するロジクールC310 HDウェブカメラ（ノイズリダクションマイク搭載）

購入したのはAmazon で，-19% off 2400円となっていたのでそれで購入しようと思っていたところAmazon のUSED で2040円送料無料があったのでそちらを購入．

Amazon | ロジクール Webカメラ C270n HD 720P ストリーミング 小型 シンプル設計 Windows Mac Chrome 対応 ブラック ウェブカメラ ウェブカム PC Mac ノートパソコン Zoom Skype 国内正規品 2年間無償保証 | Logicool(ロジクール) | 家電＆カメラ

こんな感じのパッケージで届きました．内容物は本体と小さな保証書と取説が1枚づつ．付属物一覧がないので新品もこれと同じかは不明．

このテープの切り方はちょっとアウト感．

外観はこんな感じ．C270とほぼ同じだけどC270より気持ち大きくなって，ケーブル止めのベルクロがありません．

カタログスペックはC270 とほぼ同じで，画角と画素数が少し違うよう．

| C270n | C310n

画素数

0.9MP

1.2MP

対角視野

55°

60°

Linux端末に繋いでみるとC270と同じくUVC/UAC で認識して特に問題なく利用できていそうです．

$ sudo dmesg --human --color --follow-new
[ +4.580070] usb 1-3: new high-speed USB device number 59 using xhci_hcd
[ +0.369127] usb 1-3: New USB device found, idVendor=046d, idProduct=081b, bcdDevice= 0.12
[ +0.000026] usb 1-3: New USB device strings: Mfr=0, Product=0, SerialNumber=2
[ +0.000011] usb 1-3: SerialNumber: 159F4170
[ +0.002035] usb 1-3: Found UVC 1.00 device <unnamed> (046d:081b)
[ +0.115112] input: UVC Camera (046d:081b) as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/input/input192
[ +0.071778] usb 1-3: set resolution quirk: cval->res = 384

$ lsusb -d 046d:081b
Bus 001 Device 059: ID 046d:081b Logitech, Inc. Webcam C310

$ v4l-info /dev/video2

### v4l2 device info [/dev/video2] ###
general info
VIDIOC_QUERYCAP
driver : "uvcvideo"
card : "UVC Camera (046d:081b)"
bus_info : "usb-0000:00:14.0-3"
version : 6.1.12
capabilities : 0x84a00001 [VIDEO_CAPTURE,?,?,STREAMING,(null)]

standards

inputs
VIDIOC_ENUMINPUT(0)
index : 0
name : "Camera 1"
type : CAMERA
audioset : 0
tuner : 0
std : 0x0 []
status : 0x0 []

video capture
VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
index : 0
type : VIDEO_CAPTURE
flags : 0
description : "YUYV 4:2:2"
pixelformat : 0x56595559 [YUYV]
VIDIOC_ENUM_FMT(1,VIDEO_CAPTURE)
index : 1
type : VIDEO_CAPTURE
flags : 1
description : "Motion-JPEG"
pixelformat : 0x47504a4d [MJPG]
VIDIOC_G_FMT(VIDEO_CAPTURE)
type : VIDEO_CAPTURE
fmt.pix.width : 640
fmt.pix.height : 480
fmt.pix.pixelformat : 0x56595559 [YUYV]
fmt.pix.field : NONE
fmt.pix.bytesperline : 1280
fmt.pix.sizeimage : 614400
fmt.pix.colorspace : SRGB
fmt.pix.priv : 4276996862

controls
VIDIOC_QUERYCTRL(BASE+0)
id : 9963776
type : INTEGER
name : "Brightness"
minimum : 0
maximum : 255
step : 1
default_value : 128
flags : unknown
VIDIOC_QUERYCTRL(BASE+1)
id : 9963777
type : INTEGER
name : "Contrast"
minimum : 0
maximum : 255
step : 1
default_value : 32
flags : unknown
VIDIOC_QUERYCTRL(BASE+2)
id : 9963778
type : INTEGER
name : "Saturation"
minimum : 0
maximum : 255
step : 1
default_value : 32
flags : unknown
VIDIOC_QUERYCTRL(BASE+12)
id : 9963788
type : BOOLEAN
name : "White Balance, Automatic"
minimum : 0
maximum : 1
step : 1
default_value : 1
flags : unknown
VIDIOC_QUERYCTRL(BASE+19)
id : 9963795
type : INTEGER
name : "Gain"
minimum : 0
maximum : 255
step : 1
default_value : 64
flags : unknown
VIDIOC_QUERYCTRL(BASE+24)
id : 9963800
type : MENU
name : "Power Line Frequency"
minimum : 0
maximum : 2
step : 1
default_value : 2
flags : unknown
VIDIOC_QUERYCTRL(BASE+26)
id : 9963802
type : INTEGER
name : "White Balance Temperature"
minimum : 0
maximum : 10000
step : 10
default_value : 4000
flags : INACTIVE
VIDIOC_QUERYCTRL(BASE+27)
id : 9963803
type : INTEGER
name : "Sharpness"
minimum : 0
maximum : 255
step : 1
default_value : 24
flags : unknown
VIDIOC_QUERYCTRL(BASE+28)
id : 9963804
type : INTEGER
name : "Backlight Compensation"
minimum : 0
maximum : 1
step : 1
default_value : 0
flags : unknown

$ pactl list sources | grep 'escription: Webcam C310' -B 3 -A999
Source #1114
State: RUNNING
Name: alsa_input.usb-046d_081b_159F4170-02.mono-fallback
Description: Webcam C310 モノ
Driver: PipeWire
Sample Specification: s16le 1ch 48000Hz
Channel Map: mono
Owner Module: 4294967295
Mute: no
Volume: mono: 65536 / 100% / 0.00 dB
balance 0.00
Base Volume: 20724 / 32% / -30.00 dB
Monitor of Sink: n/a
Latency: 0 usec, configured 0 usec
Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY
Properties:
alsa.card = "2"
alsa.card_name = "USB Device 0x46d:0x81b"
alsa.class = "generic"
alsa.device = "0"
alsa.driver_name = "snd_usb_audio"
alsa.id = "USB Audio"
alsa.long_card_name = "USB Device 0x46d:0x81b at usb-0000:00:14.0-3, high speed"
alsa.name = "USB Audio"
alsa.resolution_bits = "16"
alsa.subclass = "generic-mix"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
api.alsa.card.longname = "USB Device 0x46d:0x81b at usb-0000:00:14.0-3, high speed"
api.alsa.card.name = "USB Device 0x46d:0x81b"
api.alsa.path = "hw:2"
api.alsa.pcm.card = "2"
api.alsa.pcm.stream = "capture"
audio.channels = "1"
audio.position = "MONO"
card.profile.device = "1"
device.api = "alsa"
device.class = "sound"
device.id = "112"
device.profile.description = "モノ"
device.profile.name = "mono-fallback"
device.routes = "1"
factory.name = "api.alsa.pcm.source"
media.class = "Audio/Source"
device.description = "Webcam C310"
node.name = "alsa_input.usb-046d_081b_159F4170-02.mono-fallback"
node.nick = "USB Device 0x46d 0x81b"
node.pause-on-idle = "false"
object.path = "alsa:pcm:2:hw:2:capture"
priority.driver = "2000"
priority.session = "2000"
factory.id = "18"
clock.quantum-limit = "8192"
client.id = "33"
node.driver = "true"
factory.mode = "split"
audio.adapt.follower = ""
library.name = "audioconvert/libspa-audioconvert"
object.id = "92"
object.serial = "1114"
node.max-latency = "16384/48000"
api.alsa.period-size = "512"
api.alsa.period-num = "64"
api.alsa.headroom = "512"
api.acp.auto-port = "false"
api.acp.auto-profile = "false"
api.alsa.card = "2"
api.alsa.use-acp = "true"
api.dbus.ReserveDevice1 = "Audio2"
device.bus = "usb"
device.bus-id = "usb-046d_081b_159F4170-02"
device.bus_path = "pci-0000:00:14.0-usb-0:3:1.2"
device.enum.api = "udev"
device.form_factor = "webcam"
device.icon_name = "camera-web-analog-usb"
device.name = "alsa_card.usb-046d_081b_159F4170-02"
device.nick = "USB Device 0x46d:0x81b"
device.plugged.usec = "152884093590"
device.product.id = "0x081b"
device.product.name = "Webcam C310"
device.serial = "046d_081b_159F4170"
device.subsystem = "sound"
sysfs.path = "/devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.2/sound/card2"
device.vendor.id = "0x046d"
device.vendor.name = "Logitech, Inc."
device.string = "2"
Ports:
analog-input-mic: マイクロフォン (type: Mic, priority: 8700, availability unknown)
Active Port: analog-input-mic
Formats:
pcm

現在はAmazonでC270n 2,200円，C310n 2,400円と値段差があまりないのでC310の方が良さそうです．