Televue Large Field Corrector
The Televue Large Field Corrector, which optimizes edge-of-field performance, is made expressly for NP101is and NP127is. It is recommended for imaging applications incorporating 35mm and larger CCD sensors.
TeleVue Product Number: -LCL-1069
- Additional Information
SKU TE-LCL-1069 Manufacturer Tele Vue Barrel Size 2.5" Warranty 5 Year Warranty
- Included Items
- Televue Large Field Corrector
- Five Year TeleVue Warranty
- Questions & Answers
Product QuestionsWhat is the back focus requirement for this field flattener? Are field flatteners telescope specific or just focal ratio specific? I'm wondering if I find one that gives me more BF if I can use it even though from a different company than my scope.Question by: Terry Kiser on Jan 14, 2016 10:54:00 AMThe LCL1069 is actually an astigmatism corrector for 4 lens fast ~f/5.4 Petzvals, not a standard field flattener, so it would not be usable on scopes of a different design or focal ratio. The back focus after the LCL is ~61.5mm.
Field flatteners are typically lens design specific, but they do have some scalability based on focal length and focal ratio. Generally speaking, the longer the focal ratio and/or focal length, the less back focus is used as less correction is needed. The faster/shorter the system, the more back focus is used as moving the camera farther from the flattener leads to stronger correction. This variation can be 10-15mm difference depending on the exact scopes and reducers considered.Answer by: Chris Hendren (Admin) on Jan 19, 2016 5:39:00 PM
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