The T2 is pretty decent depth wise,i wont quote any specific depth figures as that basically means nothing to me,its all about using the right coil for your site on that day,what i mean by this is i was on a site last year that had just been harvested so the stubble was at least 5-6'' tall and this was very thick stubble as well,the coil for that day was the 5'' coil as that gave me the advantage of getting down closer to the ground and winkled a lovely George111 full gold guinea out in mint condition.I would not of got that coin if i had used the stock or larger coil as i would have been loosing 6'' of depth straight away above the stubble.
On other sites say like pasture that have much cleaner ground conditions i can un-leash the power of a larger coil,but just because i am using the bigger coil this does not mean to say that i will find coins at greater depth,but i could find slightly larger non coin items at greater depth.Coils loose the sensitivity to coins size items the larger they go,hence this is the reason i always take maybe 4 or more coils with me with the T2 if i am out for a full days detecting.
I only have a Standard T2,i have tried the latest upgraded versions like the Ltd and the DST ones but not enough with parting with my money,i am glad that i went down the additional coil route rather than just have the boost version.I use whats best for that day.
Also many variables can come into play regarding how deep you can pick up target,the ground conditions the way the coins is located in the ground etc,its not always about depth but using the best coil on that day,my example of the George111 guinea using the small coil paid for that detector just with that one find.No one detector/coil combination does it all and i totally agree with that one.
I would not use my biggest coil on my favourite roman villa site,the reason why its the most minerlised site and also another down side is the fact that the site has alot of trash on it,using a big coil will be wasting your time.
Fishing and Detecting have alot in common in my mind,it was that
big and it was that
deep honest guvnor,so these days i dont tend to mention depths,of course other may see it differently,i also dont tend to crank my T2 up in the settings department either,as i find that running it flat out can cause the machine to run very erratic and that can take its toll fatigue wise.
Its not all about depth,the wife says differently of course,but thats another issue
you cannot expect to hit a ultra small roman minim at the same depth as a larger coin,the orientation of the coin in the ground can also have a massive impact on depth that a detector will hit a coin.
So basically i cannot answer your question in a nutshell,its all about using the right combination on the day,only you can make that decision.
