WMS Request produces unexpected output

Question

I compiled this request to a WMS:

http://www.geoportal.tazv-luckau.de/arcgis/services/TAZV_Luckau/TWL_Luckau/mapserver/wmsserver?SERVICE=WMS&REQUEST=GetMap&VERSION=1.3.0&LAYERS=TRINKWASSERLEITUNG&STYLES=&CRS=EPSG:25832&BBOX=(814982.1936043955,5748389.886124328,815982.1936043955,5749389.886124328)&FORMAT=image/tiff&WIDTH=1000&HEIGHT=1000

As you can see, the result is stretched along the y-axis. What am i doing wrong?

Answer 1

The first comment already hints at the solution, but since it's not explicitly mentioned, I'll add an answer:

The BBOX parameter should not have parentheses around the coordinates.

(As an aside: The extent in the question's URL does not seem to contain data)

Answer 2

So I found a very good practice for editing wfs/wms etc. requests. This is the source.

• download and install the software "Fiddler" (Google will help you find its current download location)
• start Fiddler and leave it running
• in QGIS goto /Settings/Options/Network
• click on "Use proxy for web access"
• for Proxy Type select "HttpProxy"
• for Host enter: 127.0.0.1
• for Port enter: 8888
• presss "ok" button
• now Add a WMS/WFS/WCS layer in QGIS again, but watch the Fiddler window
• click on the request in Fiddler (such as GetCapabilities, GetMap, or GetCoverage)
• to see the full requested url in Fiddler, check the 'Inspector' tab, and then select 'Raw'
• then you can copy the raw url into a new browser window, load it, and examine the error and the url parameters