Camera dot sight vs budget one

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al404
al404 Contributing Member • Posts: 669
Camera dot sight vs budget one

I was wondering witch advance has a Camera dot sight like Olympus EE-1 vs a generic one

I saw this review on youtube and seems to work ok

Does alignment remain while moving zoom or adding / removing teleconverter?

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robgendreau Forum Pro • Posts: 10,228
Re: Camera dot sight vs budget one

al404 wrote:

I was wondering witch advance has a Camera dot sight like Olympus EE-1 vs a generic one

I saw this review on youtube and seems to work ok

Does alignment remain while moving zoom or adding / removing teleconverter?

I saw a sale on the EE-1 recently, but even with that I am not sure that it's worth the extra money.

There are a lot of red dot sights out there with similar characteristics. Some even sold with hot shoe mounts (check some of the astro photography sources). The nice thing about the Oly one is that it collapses to be more compact than most. And it might be easier to adjust; some require you  use a tool to change that. Most all allow changes in brightness. Some have either green or red dots, which can be useful too.

Chris R-UK Forum Pro • Posts: 22,439
Re: Camera dot sight vs budget one
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The dot sight needs to be aligned both vertically and horizontally.  The horizontal alignment is fairly straightforward but, with my EE-1, I need to do it every time I mount the RDS on my camera because it is not really tight in the hot shoe and can skew a bit when you push it in.

Vertical is more complicated because it has to be aligned for a specific distance, the focus distance.  Fortunately, for more distant targets like birds, if you set it for about 30m it will be OK for targets from about 15m to 60m.  It is much more difficult for close targets like insects where the distance has to be fairly accurate.

All of the photographic dot sights that I have seen have wheels to adjust the alignments.  With these you can, with practice, do the alignment very quickly with 3-4 shots which only takes a couple of minutes, even hand held.  If you are using a tripod it is even faster.

The problem with the RDS in the video is that you appear to need a screwdriver to adjust the alignments.  That might be OK if the sight is rigidly attached to a rifle or crossbow so you only rarely have to change it, but would be unacceptable to me on a camera when it is not rigidly attached to the hot shoe and you have to adjust it relatively frequently.

Note that, in photography, an RDS is inherently less accurate for focusing than using the viewfinder. So, IMHO, it is only worth using one for targets that are really difficult to pick up and/or track in the viewfinder.  Examples would be whale breaches, jumping dolphins and birds that either fly very erratically or appear suddenly out of nowhere.  I found that my hit rate for jumping dolphins, the hardest targets that I have ever tried to shoot, went from less than 5% using the viewfinder to about 25% using an RDS.

On the M4/3 forum where there are a lot of photographers shooting really difficult flying birds like swallows and bee eaters, most have now acquired the skills to track them in the view finder and no longer use an RDS.  I still use one for fun when shooting BIF at some locations because it gives you the chance to take a snap shot of any bird that appears very suddenly - but with quite a low hit, though. 

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Chris R

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ThrillaMozilla Veteran Member • Posts: 7,011
Re: Camera dot sight vs budget one

al404 wrote:

I was wondering witch advance has a Camera dot sight like Olympus EE-1 vs a generic one

I saw this review on youtube and seems to work ok

Does alignment remain while moving zoom or adding / removing teleconverter?

The problem with all of these is that attachment on hot shoe is imprecise and not sufficiently rigid. With some care in alignment they can be terrific.

I happen to have that sight, and it's OK.  The only problem with my sight is that the dot position shifts a little if you move your eye from side to side or top to bottom.  Good enough for birds and whales, but probably not good enough for a gun sight.  It's a bargain.  If you can figure a way to mount it, buy it.

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