Alright so these two posts confuse me
since i would prefer not to buy the fisheye, im focusing on the 18-55mm lens which i already own. i've also found another tutorial here
which seems to be quite easy to make. according to the lens database
i've found, my EOS 600D with 18mm lens would result in 86mm distance from the tripod screw to the entrance pupil.
is it worth to put some work into a selfmade panohead like this, or is such a simple rail like you suggested
just enough for my needs? i guess i'd have to measure the nodal point distance over and over again when using the simple rail, while my panohead would always have the optimized alignment everytime i set up my tripod.
We all started from the same point!
It definitely is preferable when you can organize to use a fisheye for some days when you shoot!
You need much less shots and stitching is far more simple this way for a beginner. Using a fisheye means you would need only ONE row plus Zenith.
The Nadir you might let away and retouch it by placing a logo.
You don´t need a complicated multirow-head then. Just a ring which holds the lens and which you can fix on the tripod´s center-column. You can find those rings in shops
where plumbers buy their stuff. There are DIYs on the web - this is one of the best (in German - but you see it in the pictures):http://www.langebilder.de/nodalpunktringe.php
Using his Multirow adapter - also DIY - you can shoot a full sphere easily too. As he shows it in th epictures. Clever! And cheap!
here something in English - also from Tom: http://www.langebilder.de/pipe_clamp.php
I suggest - i do it myself - to adjust the camera in a way it´s tilted down about 10 - 12° for the one-row. This way you can achieve a very small Nadir-hole which is
easy to get retouched.
For the Zenith-shot you need to tilt the camera up to 90° - if you want to show the ceiling.
IF ceiling and floor is of minor interest - then one row horizontal is enough to show a 360° pano in which you cannot look 90° up and down - but tit´s not always vital anyway
seeing a room´s ceiling and floor.
The advantage for you would be: it´s very simple to do and can be done for few bucks.