Black spot with projector lense.
343367
I had high expectations after reading hundreds of good reviews but was sadly disappointed after receiving a set for Chrsitmas. I have H7 projector lenses with a very crisp cutoff and these bulbs had a very bad black spot right where the beam should be the most intense and had a weird flare of light above the cutoff.  I'll be switching back to my Halogen bulbs as these are basically use less for light output. I believe the black spot is caused by the size of the base inside the housing that blocks light from making it out the center of the projector.  The product itself was very nice and came with all the wiring adapters you need and even zipties. In a tight H7 projector they just did not perform as expected.
3498324
l have used all three filters on my Sony a33,DT 18-55mm 5.6 SAM lens(comes with the camera).Noticed big time barrel  effect with black corners .The pictures still acceptable to a degree. I had better filter installed on my cannon lenses never had this problem before.
the reason I believe comes from the small sensor size.if anyone has the same problem on a full frame sensor please leave me a comment.
Please check pictures above
1421085
The screen worked, but it had black streaks on the screen.
2453072
I know that it is refurbished but i wasn't too happy with the quality.  The first one they sent had something stuck in the audio in port (i can only assume the male end of a headphone plug).

They then sent a replacement (i had to pay the shipping to get it to them) that had some scuffing on the lense. Since I didn't notice until after it was mounted i decided to just live with it.

Now I have a white dot on the screen that appears to be some sort of dead pixel.  I do not recommend buying a used projector from here
3131132
I just powered up the projector today, with the result that I get no light. I hope to discover that this is a user error, but the manual says that the light will start working "after a few seconds" and it didn't, even though the fan spun up. If I can't figure out (or get info on) what the problem is and how to resolve it I will be returning it, possibly for a replacement. I will update this review if the replacement works.

I just powered up the projector today. The result was no light. I am trying to determine if this is user error, but the manual says that the light will start working "a few seconds" after powering up, and it didn't. There is nothing in the very short troubleshooting section about the main light not coming on, which is another reason that I suspect it's a bad unit. I had the VGA connected to my laptop, but even with no input I would expect the light to go on. If I can't figure out what's going on I will return it either for a refund or for a replacement. If the replacement works I will update this review. (If anyone has had the "no light" problem and fixed it, please let me know what you did.)

Regardless of that, though, here are some issues/oddities that you might consider if you buy this product:
> The box it comes it does not have anything I can identify as a manufacturer's nameany nameanywhere on it.
> The box does not have any contact info or address anywhere on it.
> The manual also has neither the name nor contact info for the manufacturer. This includes the warranty card.
> A spare fuse is included but there is no instruction as to how to install it. There is no access that I can find on the shell.
> The screws that hold the shell together are inset about 3 inches! So deep that even shining multiple lights directly down the recess I am unable to determine what kind of screw is in there. Nothing I've tried so far has fit and of course I don't want to risk damage.
1334493
300mm lens so far is ok, noticed a spec on the inside, probably dust that moved away.

Tele and macro has major fog. Allowing it to settle for another day. If not then you'll be seeing it again.
4140739
After the screen fitted black spots appeared in most of the screen and there are bent may have suffered a blow
4655005
Returning it. Out of the box, the lens cap falls off, and I try to put it back on, with no success. Ok.... Not a really big deal, but I don't want the lenses to get scratched so this projector is already off to a bad start. Main purpose was to use projector wireless via my IPhone playing a movie from Netflix app. Failed. Tried over several days and received never got it to work. Some days I would receive messages like "dongle" is disconnected and would beep at me till I turned to a different input. Other days Iphone would try to connect to the projector's network, and said it was connected, Netflix said it was doing Airplay to the projector, however the projector was not showing the image. Projector would just say Airplay 00% for about 5 min then go to another screen saying Miracast.... Which I believe is Android..... Done. Meh. :(
2832317
Do not buy this projector ... it worked for 10 minutes and goes black ... I tried to contact the manufacturer and they have no contact info ... I looked on-line and found a lot of complaints with the same problem I have ... I found out it is a faulty power board ...
2892617
1/3 came with a spot where 9+ pixels were significantly brighter than the rest when the screen shows any light colors. had to have it replaced.
3114080
I bought this projector a little more than a year ago.  Within a few days of installing it, I detected a buzzing sound, quite distracting, that gradually grew louder.  I sent the projector to Optoma for warranty service.  After a couple of weeks, I hadn't heard from them so I made contact and asked about the status.  They said that it had a bad color wheel and was awaiting parts.  They added that the ETA was unknown, but that they would send me a refurbished projector immediately if I preferred.  They claimed that the refurbished projector was all new parts placed in a refurbished case.  I opted to take the refurbished item, which they said continued the warranty given my original purchase (one year).  Now I had a refurbished projector with a large "REFURBISHED" sticker on it although I paid the new projector price. This projector worked well enough for about ten months and then it developed that same buzzing sound.  It was now a few days out of warranty and I was ready to cut my losses with Optoma.  I just recently purchased a projector from a different company on Amazon.  It seems OK so far.
2413812
Construstion is well made, body is heavy and durable, lens seems good and image quality is well enough. Overall, this binocular makes a good impression. BUT! There is defect on BOTH tubes, which makes image on about 30% of view from left side very blurred.  As I am far abroad, I cannot return this item back to amazon, so I am very disappointed.
2790991
Suspect quality. 10mm lens died within 3 uses.  No idea why - camera just shows black.  16mm extension is working fine so far.  When working, this product can be amazing for macro photography work.
2877598
We had this camera for a long time.  The zoom was amazing then all of a sudden after several years it started to get a black dot in every photo. We decided to purchase a new one and in less than a year the black dot is appearing.  We will be switching brands on our next purchase!
606087
I ordered this for my parent's who lived in a different state.  Apparently there was a black 'spot' at the top edge of the screen that they didn't notice when the TV arrived.  My brother noticed it when he visited and now this spot has turned the screen into, what looks like a cracked LCD screen.  It's been over a month so I cannot return it (mea culpa) so am now stuck with attempting a repair by Toshiba...
124365
Showed up with a dead pixel that is accompanied by a faint discoloration throughout the rest of the row
4583667
Well it seems that I am having the same issues as many others, my projector started over heating after 45 mins of viewing. It's just over 1 year old, so no warrantee anymore. :-( probably won't buy Benq again.