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Tube size,light transmittion

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/09/2008 at 11:50
RonDodson View Drop Down
Optics GrassHopper
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I have read some places that a 1 inch tube transmits as much light as a 33 m. Is This true or do you actually get more light the larger the tube and front recitle. If not then why do some tactical scopes get up to .44 m on tube size? Is that just for strength and adjustment. I am intrested because I am getting a little long in the tooth and am having problems, identifying bucks and does etc. In thick brush so on.I am thinking of upgrading.I have an older 3x9 redfeild wide veiw. Just don't cut it anymore. It is actually better than some of the cheap Bushnell and Tascos. I would appreciate any input. Thanks
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/09/2008 at 13:10
silver View Drop Down
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Let me rephrase the question so that you understand it better... You are asking which gold ring is better a size 10 or a size 12.  This assumes that finger size is the only factor. 

You should be asking is "How many carrot of gold are the rings?" ie purity.  You have asked nothing about the workmanship or the quality of the materials.
 
 There may be some of "paper" differance, but there is no measured differance.  It is quality of glass, coatings and workmanship that make the real differance. You were correct in that the main thing the larger tube gives are more room for adjustments.
 
Your Redfield was a good scope in its day.  There is a lot of better made stuff today.  There have been great leaps in glass, coatings and understanding how stuff should be put together.  Add to that most optics are messed up by poor cleaning.  People use stuff that scrathes the lenses and eat off the coatings.
 
The 4200 and up Bushnells are very good.  The Zeiss Conquest is a good buy and the other favorite.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/10/2008 at 08:45
hunter12345 View Drop Down
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Your old Redfield was a good scope back in the day.A larger tube would help bring in more light more room for adjustments but the cost is worth looking at scopes like the Bushnell 4200 Sightron SII Big Sky.These scopes are great for your hunting needs and have a coating that prevents fogging in the rain.The SII BS is worth a look.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/10/2008 at 09:18
RonDodson View Drop Down
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Thanks for your imput. I also found a thread about the scope rating charts that also had some very good info.My eye sight has really went down over the last few years. I can spot animals but I sure have a hard time putting anything on there heads.Thanks again
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/10/2008 at 09:22
trigger29 View Drop Down
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Welcome to the OT. We are glad to have you. I think Silver and Hunter pretty much summed it up. A larger tube size will give you a bigger adjustment range, and stronger scope, given it is a quality unit. For low light situations a quality scope with good glass would be far better than just a scope with a larger tube size. The 4200, sightron SII and Conquests are excellent choices. I would also look into Nikon Monarch. All of these will be better than the Redfield. I own several of the Redfields, and while nice for the day, none compares to my Conquest. Just remember not to "over scope" your gun for the thick timber.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/11/2008 at 17:15
RifleDude View Drop Down
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Tube diameter has NO relation to light transmission.  Comparing 30mm and 1" scopes of equal image quality, the larger tube DOES NOT transmit more light.  Many 30mm tube scopes do have better light transmission only because there is a higher percentage of high end optics that happen to use 30mm tubes than 1" tubes, but the tube diameter has no influence on this.  As an example, if you look on the Swarovski website under the specifications for each of their scopes, they list light transmission values.  Interestingly, all of their 1" tubed scopes actually have higher light transmission % than most of their 30mm tubed scopes.

This topic has been discussed here many times in the past.  You will find a lot of good information on this subject by using the search function.
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