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Product comparison · 2 data projectors

Acer Portable LED K138STi Short throw projector 800 ANSI lumens DLP WXGA (1280x800) White vs Viewsonic Pro7827HD Standard throw projector 2200 ANSI lumens DLP 1080p (1920x1080) 3D Black

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  • 38specifications compared
  • 31differ
  • 7identical
  • 51known for one product only

Key differences

  • Projector brightness
    • 800 ANSI lumens
    • 2200 ANSI lumens
  • Projector native resolution
    • WXGA (1280x800)
    • 1080p (1920x1080)
  • Screen size compatibility
    • 635 - 2540 mm (25 - 100")
    • 762 - 7620 mm (30 - 300")
  • Service life of light source
    • 20000 h
    • 3500 h
  • Service life of light source (economic mode)
    • 30000 h
    • 6500 h
  • Digital zoom
    • 1.7x
    • 2x
  • Optical zoom
    • 1x
    • 1.3x
  • Throw ratio
    • 0.8:1
    • 1.1 - 1.5:1

Side by side

Differences highlightedShow differences only
89 specifications
A

Acer

Portable LED K138STi Short throw projector 800 ANSI lumens DLP WXGA (1280x800) White

Model K138STi

View product
B

Viewsonic

Pro7827HD Standard throw projector 2200 ANSI lumens DLP 1080p (1920x1080) 3D Black

Model Pro7827HD

View product
Projector3 differ
Projector brightnessDiffers800 ANSI lumens2200 ANSI lumens
Projection technologyDLPDLP
Projector native resolutionDiffersWXGA (1280x800)1080p (1920x1080)
Contrast ratio (typical)Known for one100000:1
Native aspect ratioKnown for one16:10
Supported aspect ratiosKnown for one4:3, 16:10, 16:9
Screen size compatibilityDiffers635 - 2540 mm (25 - 100")762 - 7620 mm (30 - 300")
Projection distanceKnown for one0.4 - 1.7 m
Number of coloursKnown for one1.073 billion colours
Projector brightness (economic mode)Known for one640 ANSI lumens
UniformityKnown for one90%
Horizontal synchronization (max)Known for one100 kHz
Horizontal synchronization (min)Known for one30 kHz
Keystone correction, verticalKnown for one-40 - 40°
Vertical synchronization (max)Known for one0.12 kHz
Vertical synchronization (min)Known for one0.05 kHz
Contrast ratio (dynamic)Known for one22000:1
Light source2 differ
Light source typeKnown for oneLED
Service life of light sourceDiffers20000 h3500 h
Service life of light source (economic mode)Differs30000 h6500 h
Lamps quantityKnown for one1 lamp(s)
Lens system3 differ
FocusKnown for oneManual
Zoom ratioKnown for one1.7:1
Digital zoomDiffers1.7x2x
Optical zoomDiffers1x1.3x
Throw ratioDiffers0.8:11.1 - 1.5:1
OffsetKnown for one130%
Videoidentical
HD-ReadyKnown for oneYes
3D ReadyKnown for oneYes
Supported graphics resolutionsKnown for one1280 x 800 (WXGA), 1920 x 1080 (HD 1080)
Analog signal format systemKnown for oneNot supported
Full HDKnown for oneYes
3DKnown for oneYes
Ports & interfaces6 differ
VGA (D-Sub) ports quantityDiffers12
HDMI ports quantityDiffers13
Component video (YPbPr/YCbCr) inDiffers01
Composite video inDiffers01
DVI portNoNo
S-Video inputs quantityDiffers01
USB 2.0 ports quantity11
Audio (L/R) inDiffers02
PC Audio inKnown for oneYes
PC Audio outYesYes
PC in (D-Sub)Known for oneYes
AC (power) inKnown for oneYes
Microphone inKnown for oneYes
Serial interface typeKnown for oneRS-232
12V triggerKnown for oneNo
Mobile High-Definition Link (MHL)Known for oneYes
Network2 differ
Ethernet LANDiffersYesNo
Ethernet LAN (RJ-45) portsDiffers10
Wi-FiKnown for oneNo
Storage1 differ
Card reader integratedYesYes
Compatible memory cardsDiffersMicroSD (TransFlash)SD
Features2 differ
Noise levelDiffers33 dB36 dB
Noise level (economic mode)Differs29 dB31 dB
On Screen Display (OSD)Known for oneYes
Multimedia2 differ
Built-in speaker(s)DiffersNoYes
Number of built-in speakersKnown for one2
RMS rated powerDiffers3 W10 W
Video formats supportedKnown for oneH.264, MPEG1, MPEG2, MPEG4, VC-1, XVID
Audio formats supportedKnown for oneAAC, MP1, MP2, MP3, PCM, WAV, WMA
Design3 differ
Product typeDiffersShort throw projectorStandard throw projector
Market positioningKnown for onePortable
Product colourDiffersWhiteBlack
PlacementDiffersCeilingDesktop, Ceiling
Displayidentical
Built-in displayNoNo
Display number of coloursKnown for one1.073 billion colours
Power2 differ
Power sourceDiffersAC/BatteryAC
Power consumption (typical)Differs80 W350 W
Power consumption (economy mode)Known for one38 W
AC input voltage100 - 240 V100 - 240 V
Battery life (max)Known for one2.6 h
AC input frequencyKnown for one50 - 60 Hz
Batteryidentical
Battery technologyKnown for oneLithium-Ion (Li-Ion)
Battery capacityKnown for one400 mAh
Operational conditionsidentical
Operating temperature (T-T)Known for one5 - 40 °C
Operating relative humidity (H-H)Known for one0 - 80%
Weight & dimensions4 differ
WeightDiffers1 kg2.6 kg
WidthDiffers240 mm316 mm
DepthDiffers147 mm228 mm
HeightDiffers59 mm103.7 mm
Packaging content1 differ
Remote control includedDiffersNoYes
Batteries includedKnown for oneYes
Cables includedKnown for oneAC, VGA
Carrying caseKnown for oneNo
Quick start guideKnown for oneYes
Technical detailsidentical
Compliance certificatesKnown for oneRoHS
Other featuresidentical
RS-232 portsKnown for one1

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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