Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Darkness ZeroPak


User Tag List

+ Reply to Thread
Results 1 to 5 of 5
Like Tree2Likes
  • 1 Post By hunter308
  • 1 Post By Spudattack

Thread: Focal plane, first and second

  1. #1
    Member smidey's Avatar
    Join Date
    Nov 2013
    Location
    Whangarei Heads
    Posts
    1,157

    Focal plane, first and second

    This is very new to me, focal planes so I'd like some advice please.
    I bought a vortex diamondback 4-12x40 scope with dead hold bdc for my 223. I have sighed it in, chronied my ammo and input the data into strelok app.
    It tells me that the second mark down is 187m for that info at full magnification.
    My question is, with it being second focal plane the bdc reticle doesn't enlarge so does that mean the range for the bdc marks stay the same on all zooms or does it does it change as you zoom because the target enlarged?

    I was looking into buying the strelok+ app to get more options including the ranges at different zooms but from what I have been reading I may not need to.

    Sent from my workbench
    If i could have a full time job shooting pests i'm up for over time.

  2. #2
    Member hunter308's Avatar
    Join Date
    Mar 2012
    Location
    Waikato
    Posts
    3,086
    Easier to watch this video if I tried to explain it guaranteed someone here would tell me I am talking shit so better for the experts to explain

    http://www.vortexoptics.com/video/fi...nd_focal_plane
    smidey likes this.
    RULE 4: IDENTIFY YOUR TARGET BEYOND ALL DOUBT


    To be a Human is to be an Alien, ask the animals, We invade this world and we are killing it, we are destroying the earth and nobody gives a fuck except for the animals
    .

  3. #3
    Numzane Spudattack's Avatar
    Join Date
    Aug 2012
    Location
    Tauranga
    Posts
    2,990
    Hey Bud

    Being second focal plane means the reticule marks only work for the given magnification, as the reticue doesn't change it means the distance between the marks changes with magnification.
    I don't find this an issue as when you are shooting at a range that you need to use your holdover marks you will go to full magnification anyway.
    A FP scope the reticule changes size with magnification and therefore stays the same size relative to the target, the reticule marks therefore work at all magnifications.

    Hope this helps!
    smidey likes this.
    "Here's the deal I'm the best there is. Plain and simple. I wake up in the morning and I piss excellence."

  4. #4
    Member smidey's Avatar
    Join Date
    Nov 2013
    Location
    Whangarei Heads
    Posts
    1,157
    Quote Originally Posted by hunter308 View Post
    Easier to watch this video if I tried to explain it guaranteed someone here would tell me I am talking shit so better for the experts to explain

    http://www.vortexoptics.com/video/fi...nd_focal_plane
    Thanks dude, clears that perfectly.
    So the answer is no, the bdc markers are different ranges on different zooms but the reticle stays the same size at all sons so is better for hunting small game art longer ranges because it doesn't become larger and cover the target

    Sent from my workbench
    If i could have a full time job shooting pests i'm up for over time.

  5. #5
    Member smidey's Avatar
    Join Date
    Nov 2013
    Location
    Whangarei Heads
    Posts
    1,157
    Quote Originally Posted by Spudattack View Post
    Hey Bud

    Being second focal plane means the reticule marks only work for the given magnification, as the reticue doesn't change it means the distance between the marks changes with magnification.
    I don't find this an issue as when you are shooting at a range that you need to use your holdover marks you will go to full magnification anyway.
    A FP scope the reticule changes size with magnification and therefore stays the same size relative to the target, the reticule marks therefore work at all magnifications.

    Hope this helps!
    Thanks mate, makes sense for sure.
    I'd rather a second focal plane for what I use it for and really it will be at full magnification most of the time anyway so all good

    Sent from my workbench
    If i could have a full time job shooting pests i'm up for over time.

 

 

Similar Threads

  1. Guns on a plane?
    By possummatti in forum Hunting
    Replies: 42
    Last Post: 13-09-2015, 08:10 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!