This is my first post on this forum, so please be gentle with this virgin. I have looked for an answer to my question and I not find the answer...if it was overlooked please forgive me.

Here's my question, one of a technical nature.

For 30 mm tubes use a factor of 4..

For 1 inch tubes use a factor of 3.

I have been told that in regards to a true 30 mm variable powered scope you divide the lowest magnification number into the highest magnification number by the factor of 4, for example a scope such as the **Swarovski PH 4X16X50 P**, 4 x 4 = 16 or 16 divided by 4 = 4.. This appears to be the rule on the better 30 mm tubes.

Now consider the **Leupold 3.5-14x50 LPS 30mm** using the same formula as above 3.5 x 4 = 14 or 14 divided by 4 = 3.5, again this formula seems to work.

Now let's take a look at the **Leupold 4.5-14x50 VX-III 30mm Riflescope **using the same formula for a 30 mm tube. 4.5 x 14 = 18, 14 divided by 4.5 = 3.11. duh? Huh? What? Let's try the one inch formula on the same **Leupold 4.5-14x50 VX-III 30mm Riflescope.** 4.5 x 3 =13.5, 14 divided by = 4.6.

Using this information it would appear that the **Leupold 3.5-14x50 LPS 30mm Riflescope** is a true 30 mm tubed scoped, and the **Leupold 4.5-14x50 VX-III 30mm Riflescope **appears to be a 1 inch tube scope hiding out in a 30 mm tube. Is this correct?

Thanks for any information.