Hi Guys.

Sorry if this has been asked before. Im looking for some info on the lomo round fronts.

Ive been having a look around at different sets. the 35mm seems to be standard with a 141/142mm front diameter. With the 50, 75 and 100 tho, there seems to be some sets that have 104mm front diameter and some sets that have 110. Is the glass identical and the housings just slightly different? Is one set newer than others? Looking at trying to purchase some but also just very curious?

Thanks.