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Thread: FFP & SFP scopes?

  1. #1
    Join Date
    Jan 2006
    Location
    Georgia, USA
    Posts
    602

    FFP & SFP scopes?

    I have read that variable second focal plane (SFP) scopes have to be adjusted to a certain magnification to range a target correctly. Also the thickness of the reticule stays the same thickness at all magnifications.

    The variable first focal plane (FFP) scopes can range at all magnifications, but the reticule gets thicker as the magnification increases as the power increases. If the target increases in size along with the reticule isn't thickness relative to the size of the target so it really doesn't matter.

    Am I correct or not in my thinking? Please let me know one way or the other.

    "Aim small miss small",

    gt40
    Last edited by gt40; 11-08-2009 at 06:56 AM.

  2. #2
    Join Date
    Sep 2006
    Posts
    410
    Quote Originally Posted by gt40 View Post
    I have read that variable second focal plane (SFP) scopes have to be adjusted to a certain magnification to range a target correctly. Also the thickness of the reticule stays the same thickness at all magnifications.

    The variable first focal plane (FFP) scopes can range at all magnifications, but the reticule gets thicker as the magnification increases as the power increases. If the target increases in size along with the reticule isn't thickness relative to the size of the target so it really doesn't matter.

    Am I correct in my thinking? If not please correct me.

    "Aim small miss small",

    gt40
    According to US Optics your correct. The x hair grows at the same rate as the target or viceaversa. If the x hair covers 10% of the target at 10 power then you turn it up to 42 power you still covering 10% of the target because the target grows just like the x hairs.
    vinny

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