Because it takes less materials and time to make a pen. For an Aries style laser you need to make a much larger casing with a heatsink. The casing alone adds a considerable amount to the cost.MB500 said:Thanks guys. I think 125mW would be enough for me. I really like the Aries style casing (with the key and shutter and what not), but why does it cost so much less to have 125mW in a pen.
MB500 said:I have $500 to put towards buying or building another laser(s), but there are many options. Does anyone have some suggestions on lasers to buy or laser projects? The lasers I have are in my signature.
robjdixon said:great post jay-rob
may i say that his heatsinks are fantastic