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BenQ TH585 vs Optoma HD28HDR: Which is the Best?

The BenQ TH585 and the Optoma HD28HDR are two of the best projectors on the market today. Knowing how to distinguish between them, which is more suitable for your needs, and why one might be a better deal than the other can be difficult and time-consuming.
In this post, we will go over all you need to know about both projectors so that you can make an educated decision as to which one is best suited for your needs.

Here is a table with a comparison of features for both projectors to help you decide which one is best suited for your needs.

FeatureBenQ TH585Optoma HD28HDR
Projection SystemDLPDLP
Contrast Ratio10,000:150,000:1
ANSI Lumens3,5003,600
Aspect Ratio16:10,16:9,4:3,Auto,Real16:9 (native), 4:3, 16:10 and LBX compatible
Native Resolution1080p (1920 x 1080)1080p (1920 x 1080)
Maximum ResolutionWUXGA (1920 x 1200)HDMI 2.0: 4K UHD (3840 x 2160) (60 Hz)
HDMI 1.4a: 4K UHD (3840 x 2160) (30 Hz)
Input lag16ms8.40ms
3D CompatibilityFrame Packing, Frame Sequential, Side by Side, Top BottomSide-by-side:1080i50 / 60, 720p50 / 60
Frame-pack: WUXGA24, 720p50 / 60
Over-under: WUXGA24, 720p50 / 60
Color Gamut SupportREC.709REC.709
Keystone Correction – Vertical± 40°± 40°
Keystone Correction – HorizontalNot supportedNot supported
Lens Shift – Vertical± 5%Not supported
Lens Shift – HorizontalNot supportedNot supported
Throw Ratio Range1.5 – 1.651.47:1 ~ 1.62:1
Lamp LifeNormal: 4000H
Economical: 10000h
Smart Eco: 8000h
Lamp Save: 15000h
4000 (Bright), 15000 (Dynamic), 10000 (Eco)
HDMI2 x HDMI1 x HDMI 2.0 (HDCP 2.2)
1 x HDMI 1.4a
Speaker10W x 15W x 1
Anamorphic Lens SupportNoNo
Fan Noise35/29 dBA (Normal/Economic mode)26dB
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Contrast Ratio

BenQ TH585: 10,000:1
Optoma HD28HDR: 50,000:1 High Contrast Ratio
Winner: Optoma HD28HDR (by a landslide)

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While contrast ratio doesn’t always guarantee the best picture quality of a projector, at least in terms of the black levels and overall depth, it does tell you how good the native contrast is of a projector. The higher the Contrast Ratio, the better. A Contrast Ratio of 50,000 means that there are very deep blacks and shadow details that will come out very well on this projector.

Native Resolution

BenQ TH585: 1080p (1920 x 1080)
Optoma HD28HDR: 1080p (1920 x 1080)
Winner: Draw

The Optoma HD28HDR and the BenQ TH585 have the same native resolution of 1080p. Both projectors are capable of displaying an amazing 1080p image.

Maximum Resolution

BenQ TH585: 1920 x 1200
Optoma HD28HDR: 3840 x 2160 (4K)
Winner: BenQ TH585

The Optoma HD28HDR has a higher maximum resolution than the BenQ TH585, however, due to scaling issues that can occur in some applications, the BenQ TH585 is capable of displaying images with superior quality than the Optoma.

But if you input a 4K into BenQ TH585, it may not project the content, because the maximum resolution is only WUXGA (1920 x 1200).


BenQ TH585: 3500 lumens
Optoma HD28HDR: 3600 lumens
Winner: Tie

Both projectors have comparable brightness levels (lumens). While the Optoma HD28HDR has a slight edge, both do great in bright rooms and can handle daytime viewing in your living room.
If you plan on using this projector for daytime viewing in a well-lit area with windows, then either of these projectors should suffice. If you plan on using this projector for nighttime gaming, it’s worth noting that the Optoma HD28HDR is slightly brighter than the BenQ TH585 by ~100 lumens.

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Input Lag

BenQ TH585: 16ms
Optoma HD28HDR: 8.4ms
Winner: Optoma HD28HDR (by a landslide)

Before you actually go through the trouble of measuring input lag, you will want to first compare it to other projectors on the market. A projector’s input lag is how long it takes for an image to appear on the screen when a signal is sent to it. Generally speaking, if the input lag of a projector is under 10ms, then it should be fine for most gaming purposes. The BenQ TH585 has a slightly higher 16ms input lag which makes it not the best for competitive gamers as it can cause delays in your reaction time.
In comparison, the Optoma HD28HDR has an input lag of 8.4ms, making it extremely good for gaming and other fast-paced activities. The game mode of Optoma HD28HDR optimizes the projector for maximum contrast and vivid colors. These details help you immerse in the game.


BenQ TH585: 2 x HDMI
Optoma HD28HDR: HDMI 2.0 (HDCP 2.2), HDMI (1.4a)
Winner: Optoma HD28HDR

Both projectors have one HDMI port. However, the Optoma HD28HDR has a second HDMI port that is 1.4a that supports both audio and video output at the same time.
In addition to HDMI, the BenQ TH585 projector also support MHL, which allows you to connect your smartphone to the projector via an MHL cable. This way, you’ll be able to display content from your phone on a big screen.

The HDCP 2.2 in Optoma HD28HDR is used to ensure the highest IMAGE and AUDIO security. This will prevent copying of content. The HDCP 2.2 in BenQ TH585 is used for digital output from set-top boxes and streaming players to play multimedia content from the internet without quality loss.

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BenQ TH585: 10W x 1
Optoma HD28HDR: 5W x 1
Winner: BenQ TH585

While both projectors have a built-in speaker, the BenQ TH585 has a 10W speaker whereas the Optoma HD28HDR has a 5W speaker.
The 5W speaker in the Optoma HD28HDR isn’t too bad, but it can’t get very loud and may not be suitable for everyone’s tastes.
If you plan on doing any serious media consumption with this projector, you’ll want to use external speakers or an AV receiver.

Lens Throw Ratio

BenQ TH585: 1.5 – 1.65
Optoma HD28HDR: 1.47:1 – 1.62:1
Winner: Draw

Lens throw ratio is a measurement of how large the viewing image is in relation to the distance from the lens to the screen. Basically, it’s how much you can move a projector from an image before it becomes too small. The lens throw ratio on the Optoma HD28HDR is slightly smaller than that of BenQ TH585 (1.47:1 – 1.62:1 vs 1.5 – 1.65).


Ultimately there is no right or wrong answer. What is best for you depends on what your current and future needs are, what your budget is, and everything else in between.
For most people who want to use this projector for normal uses like movies and maybe gaming, the Optoma HD28HDR should be just fine. It’s brighter, has an amazing contrast ratio, fantastic input lag, and it’s more than capable of displaying 4K content without any issues (by downscaling it to 1080p).

BenQ TH585Optoma HD28HDR
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