From what i see on here Lowrance blows humminbird out of the water on Brushpile detail. What are your thought's? I have a Hbird 581i HD DI and im not impressed at all with the down imaging at all..

From what I have seen, they are equal. It's the operator that determines the image quality.

Actually your Humminbird does a little better since it has a higher resolution display.

This is another ford vs chevy type of deal. I have a buddy that has an 1198 and I have hds-8's. I choose lowrance for di, I can dang near count the crappie on a brushpile.

The Humminbird Side Imaging units don't have a dedicated Down Imaging crystal, BUT an experienced owner can get very good images.
You can see the individual weed stems in this thick weedbed of Egeria which is similar to Hydrilla.
This is from a Humminbird 798ci SI.

See Brushpiles on mine you cant hardly tell if its a huge baitball on the bottom or a Brushpile..?

I think if i had color it would help.

You would also think that these companies would give you accurate images and instruction on what you are actually seeing instead of us having to quess at it as far as proper settings etc..

I agree i have seen images like that but they are usually on side imaging where you can actually see the fish.

I have put the back of the boat over Standing timber in deep water and it just shows a bunch of Clutter.. Nothing like the image on the screen when you look at them online for sale.

Nothing like this..

can you post some images that you have ? and present settings?
Also keep in mind you have a 297.00 fishfinder.. dont expect 1800.00 images.

Sensitivity usually around 8 for the sonar. DI i have maxed out. Generally use auto on the depth but sometimes i will adjust it to about 5 feet deeper than the area that i am fishing. Scroll speed is always on Ultra.

What I see is inexperienced owners not understanding the imaging technology.
The sonar pulse is very thin front to back and is wide to the sides.
For the unit to "draw" the images on the display, it takes movement so the sonar pulse can scan and the image recorded.
It isn't a camera and video monitor and it is not traditional sonar with a cone shaped pulse.
It is similar to a CAT scan that hospitals use.
To put it simply, "if you ain't moving, you ain't scanning" so you will have no decernable image.

That posted 581i image shows the speed of the boat as 4.5 mph, not 0.

This is a screen capture from a Humminbird 597ci HD DI of a bridge support. Copied from another post: