Aug 27, 2020
This Optoma UHD15A review is targeted for users who seek true realism in every scene. This device is a 4K Ultra HD projector that is unmatched in home entertainment. It will provide you with superb c...
Read More
Optoma UHD51A vs Epson PowerLite 1781W
Optoma and Epson
uhd51a.jpg
Add home theater projector to comparison
We didn't find anything to show here
Common
Product
Optoma UHD51A
Epson PowerLite 1781W
Model
UHD51A
PowerLite 1781W
Brand
Optoma
Epson
Reviews
146
115
Resolution
Native resolution
3840 x 2160
1280 x 800
Max resolution (resized)
3840 x 2160
1920 x 1200
Resolution abbreviation
4K UHD
WXGA
Properties
Projection screen size, inch
30-300
50-150
Projection distance, m/ft
0.8 - 10.6/2.9 - 34.8
1.1 - 4.1/3.2 - 13.1
Aspect ratio
16:9
16:10
Brightness, lumens
2400
3200
Contrast ratio
500000:1
10000:1
Throw ratio range
1.21:1 - 1.59:1
1.04:1 - 1.26:1
Color reproduction
1.07 billion
1.07 billion
Projection system
DLP
3LCD
Noise level, dBA
28
39
Power consumption, W
317
309
Features
Remote control
HDR
3D
Security
kensington lock, password protection
password protection
Projection method
front, rear, ceiling mount, tabletop
front, rear, ceiling mount, tabletop
Wireless connection
Additional features
DLP, Amazon Alexa, Google Assistant
has not
Lamp
Lamp type, W
240
214
Lamp life (normal mode), hours
4000
4000
Lamp life (eco mode), hours
15000
7000
Connectivity
HDMI
2
1
VGA input
1
1
Composite video input (RCA)
0
1
Audio input (RCA)
0
1
Audio input (3.5mm)
1
0
Audio output (3.5mm)
1
0
SPDIF (optical)
1
0
Ethernet (RJ45)
1
0
MHL
RS-232
1
0
12V trigger
1
0
USB
3
1
USB (service)
1
1
Audio
Integrated speakers
Speaker power, W
5
1
Sound type
stereo
mono
Lens
F-number
2.5 - 3.26
1.58 - 1.7
Focal length, mm
20.91 - 32.62
13.5 - 16.2
Lens shift, %
vertical +/- 15
vertical +/- 45, horizontal +/- 30
Zoom ratio
1.3x
2.1x
Settings
Keystone adjustment vertical, +- degrees
30
Keystone adjustment horizontal, +- degrees
20
Operating temperature
Min, C/F
5/41
5/41
Max, C/F
40/104
35/95
Dimensions
Size W x H x D, сm/inches
39.2 x 12.9 x 28.1/15.4 x 5.1 x 11.1
29 x 5 x 21/11.42 x 2.1 x 8.2
Weight, kg/pounds
6.5/11.7
7.3/16.1
Other
Release year
2018
2017
Projectors CHooseratoR comparison rating
- 9.6Optoma UHD51A
- 7Epson PowerLite 1781W
Latest home theater projector comparisons
$1900$0
$3000$2100
Popular home theater projector comparisons
$400$300
$400$400
$1100$800